Author Topic: Photography technical advice, questions, tips and techniques.  (Read 13922 times)

hermes2015

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Re: Photography technical advice, questions, tips and techniques.
« Reply #135 on: August 14, 2018, 10:57:45 AM »
I have just found a weird one.

Using the wide angle front lens on my 18-140mm lens with the camera set to P it refuses to focus using the viewfinder but is happy to do so using "live view" and the back screen!

On "intelligent" setting and auto flash it is quite happy with the viewfinder. This is the setting I used in my workshop picture.

 :wtf:

Dave

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Re: Photography technical advice, questions, tips and techniques.
« Reply #136 on: August 14, 2018, 11:52:59 AM »
I have just found a weird one.

Using the wide angle front lens on my 18-140mm lens with the camera set to P it refuses to focus using the viewfinder but is happy to do so using "live view" and the back screen!

On "intelligent" setting and auto flash it is quite happy with the viewfinder. This is the setting I used in my workshop picture.

 :wtf:

Sorry, I got it slightly wrong - in the first case it focusses in the viewfinder but refuses to trigger the shutter. Using "live view" it takes the shot.

Hmm, I will try putting it on auto flash on the P setting, hang on . . .  Nope, only wants to work on live view. This is OK for what I wanted to do, flash might have attracted to much attention in a public space. (Seems we are not supposed to take pictures in the malls in town.)

But it is weird! Electronically the camera does not know the w/a is there; practically it focusses but gives a small red central square and a red, sort of, bracket round the central third of the f-o-v in the viewfinder when the shutter release is fully pressed.

Setting the metering to full screen the red bits, though lots of little squares now, still appear but it takes the shot. It was a high contrast, sunny window in the centre, light shadows around. Need to play more.

Reckon its a dodgy algorithm!

Oh, noticed that there might be film/coating separation starting on the front lens of that cheapo w/a lens. Little bubbles like you see with badly applied protective films on phones. It does not seem to be a protective film here. No obvious sign of it degrading the image so far.
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Bad Penny II

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Re: Photography technical advice, questions, tips and techniques.
« Reply #137 on: August 14, 2018, 11:59:21 AM »
I think my cheap waterproof Nikon makes lots of folders, haven't used it for a while.
You can do a *.jpg or whatever file extension search, then drag them into a folder on your computer in one go.  The name the camera gives the pics probably runs in order, otherwise just order by date.  This is in File/windows explorer.

Canon uses one folder (for pics at least).  I just drag them into a windows folder and then delete them from camera in windows.  No problems so far and I have taken a lot.

I don't often format for Canon but my Nikon got an increasingly messy file structure so I did.

Certainty disturbs me


Dave

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Re: Photography technical advice, questions, tips and techniques.
« Reply #138 on: August 14, 2018, 12:16:26 PM »
I think my cheap waterproof Nikon makes lots of folders, haven't used it for a while.
You can do a *.jpg or whatever file extension search, then drag them into a folder on your computer in one go.  The name the camera gives the pics probably runs in order, otherwise just order by date.  This is in File/windows explorer.

Canon uses one folder (for pics at least).  I just drag them into a windows folder and then delete them from camera in windows.  No problems so far and I have taken a lot.

I don't often format for Canon but my Nikon got an increasingly messy file structure so I did.

I set up a default GEN(eral) folder in my Nikon, then special folders for special tasks.

But I have to remember to fight through the menu system to make sure I get the right one for the next job. There is a programmable "fn" button but folder change is not an option on that.
« Last Edit: August 14, 2018, 01:49:54 PM by Dave »
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jumbojak

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Re: Photography technical advice, questions, tips and techniques.
« Reply #139 on: August 14, 2018, 12:30:09 PM »
Well, it doesn't really matter that the photos are all jumbled up because my experiment with the maximum f-stop was a miserable failure. Turns out, f/40 isn't very good for taking clear photos...

One can learn a lot from failed experiments, so please give us more details and we will all chip in with some suggestions. My motives are a bit selfish; I hope to learn from your experiments as well.

By f/40, I assume you mean f/4? It is possible to take clear photos at all f stops, so it was probably just a focusing problem. The wider the f-stop, the smaller the depth of field, so precise focusing becomes critically important.

No, the aperture was set to f/40! Shutter speed was 1/2 a second which I think was where my problem arose. Of the ospreys are out this morning I'll crank it down to f/22 and gradually ruse from there. My experiment was with the hyperfocal distance focusing. From what I had been reading the higher the f-stop the better so I went really, really high!
 

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hermes2015

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Re: Photography technical advice, questions, tips and techniques.
« Reply #140 on: August 14, 2018, 12:32:13 PM »
I have just found a weird one.

Using the wide angle front lens on my 18-140mm lens with the camera set to P it refuses to focus using the viewfinder but is happy to do so using "live view" and the back screen!

On "intelligent" setting and auto flash it is quite happy with the viewfinder. This is the setting I used in my workshop picture.

 :wtf:

Sorry, I got it slightly wrong - in the first case it focusses in the viewfinder but refuses to trigger the shutter. Using "live view" it takes the shot.

Hmm, I will try putting it on auto flash on the P setting, hang on . . .  Nope, only wants to work on live view. This is OK for what I wanted to do, flash might have attracted to much attention in a public space. (Seems we are not supposed to take pictures in the malls in town.)

But it is weird! Electronically the camera does not know the w/a is there; practically it focusses but gives a small red central square and a red, sort of, bracket round the central third of the f-o-v in the viewfinder when the shutter release is fully pressed.

Setting the metering to full screen the red bits, though lots of little squares now, still appear but it takes the shot. It was a high contrast, sunny window in the centre, light shadows around. Need to play more.

Reckon its a dodgy algorithm!

Oh, noticed that there might be film/coating separation starting on the front lens of that cheapo w/a lens. Little bubbles like you see with badly applied protective films on phones. It does not seem to be a protective film here. No obvious sign of it degrading the image so far.

Is the camera set on AF-S or AF-C? If on AF-S, try it with AF-C.

hermes2015

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Re: Photography technical advice, questions, tips and techniques.
« Reply #141 on: August 14, 2018, 12:36:39 PM »
Well, it doesn't really matter that the photos are all jumbled up because my experiment with the maximum f-stop was a miserable failure. Turns out, f/40 isn't very good for taking clear photos...

One can learn a lot from failed experiments, so please give us more details and we will all chip in with some suggestions. My motives are a bit selfish; I hope to learn from your experiments as well.

By f/40, I assume you mean f/4? It is possible to take clear photos at all f stops, so it was probably just a focusing problem. The wider the f-stop, the smaller the depth of field, so precise focusing becomes critically important.

No, the aperture was set to f/40! Shutter speed was 1/2 a second which I think was where my problem arose. Of the ospreys are out this morning I'll crank it down to f/22 and gradually ruse from there. My experiment was with the hyperfocal distance focusing. From what I had been reading the higher the f-stop the better so I went really, really high!

Wow, none of my lenses has a stop smaller than f22. F40 is really very small. Which lens is that?

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Re: Photography technical advice, questions, tips and techniques.
« Reply #142 on: August 14, 2018, 02:00:03 PM »
I have just found a weird one.

Using the wide angle front lens on my 18-140mm lens with the camera set to P it refuses to focus using the viewfinder but is happy to do so using "live view" and the back screen!

On "intelligent" setting and auto flash it is quite happy with the viewfinder. This is the setting I used in my workshop picture.

 :wtf:

Sorry, I got it slightly wrong - in the first case it focusses in the viewfinder but refuses to trigger the shutter. Using "live view" it takes the shot.

Hmm, I will try putting it on auto flash on the P setting, hang on . . .  Nope, only wants to work on live view. This is OK for what I wanted to do, flash might have attracted to much attention in a public space. (Seems we are not supposed to take pictures in the malls in town.)

But it is weird! Electronically the camera does not know the w/a is there; practically it focusses but gives a small red central square and a red, sort of, bracket round the central third of the f-o-v in the viewfinder when the shutter release is fully pressed.

Setting the metering to full screen the red bits, though lots of little squares now, still appear but it takes the shot. It was a high contrast, sunny window in the centre, light shadows around. Need to play more.

Reckon its a dodgy algorithm!

Oh, noticed that there might be film/coating separation starting on the front lens of that cheapo w/a lens. Little bubbles like you see with badly applied protective films on phones. It does not seem to be a protective film here. No obvious sign of it degrading the image so far.

Is the camera set on AF-S or AF-C? If on AF-S, try it with AF-C.

Good point. So many bloody bells and whistles I keep forgetting the notes!

Tried setting it up as I had done for those macro shots - with the lens pointing down the friction on the zoom is not enough to prevent the extra weight  extending it fully under gravity and it is difficult to wind back up without pushing as well!
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Dave

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Re: Photography technical advice, questions, tips and techniques.
« Reply #143 on: August 14, 2018, 08:44:08 PM »
Well, my Nikkor 50mm f1.8 has arrived, was fitted and played with within minutes!

I tried it with that w/a front lens, but that seems to do weird things with the focus. Works close up but cannot get the other end of the room in focus, needs playing with in daylight first.

Here is a picture of a cutting mat using that combo, with cm squares, shows a bit of barrel distortion, not unexpected:



Just noticed there is also a bit of lateral "spreading"; there are five x cm squares divided by thicker lines, but the two thin lines at the sides are "thickened".

Looks like the fish eye effect needs the shorter focal length. Ain't gonna buy an 18mm or a 25mm to see though, will use the bottom end of the 18-140mm! The ring and the viewfinder display cannot agree what the f-stop is, despite its contacts the lens does not feed back to the proccessor it seems. Looks like full manual mode might be required for flash, but I have no distance/f-stop data for the built in flashgun. Even more playing needed . . .
« Last Edit: August 14, 2018, 09:10:49 PM by Dave »
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jumbojak

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Re: Photography technical advice, questions, tips and techniques.
« Reply #144 on: August 14, 2018, 09:26:14 PM »
Well, it doesn't really matter that the photos are all jumbled up because my experiment with the maximum f-stop was a miserable failure. Turns out, f/40 isn't very good for taking clear photos...

One can learn a lot from failed experiments, so please give us more details and we will all chip in with some suggestions. My motives are a bit selfish; I hope to learn from your experiments as well.

By f/40, I assume you mean f/4? It is possible to take clear photos at all f stops, so it was probably just a focusing problem. The wider the f-stop, the smaller the depth of field, so precise focusing becomes critically important.

No, the aperture was set to f/40! Shutter speed was 1/2 a second which I think was where my problem arose. Of the ospreys are out this morning I'll crank it down to f/22 and gradually ruse from there. My experiment was with the hyperfocal distance focusing. From what I had been reading the higher the f-stop the better so I went really, really high!

Wow, none of my lenses has a stop smaller than f22. F40 is really very small. Which lens is that?

This one:
https://www.amazon.com/gp/aw/d/B00005Y3OM?psc=1&ref=yo_pop_mb_pd_title


But I'm thinking that the "limited compatibility" this lens has with my camera might be doing some wonky stuff. And there's supposed to be a dial or something to manually adjust the aperture that I can't find now that I'm looking for it! Could be a bad description.
 

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your flue clean."  - Ecurb Noselrub
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your copy of the KJV. " - Icarus

Dave

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Re: Photography technical advice, questions, tips and techniques.
« Reply #145 on: August 14, 2018, 09:59:18 PM »
Well, it doesn't really matter that the photos are all jumbled up because my experiment with the maximum f-stop was a miserable failure. Turns out, f/40 isn't very good for taking clear photos...

One can learn a lot from failed experiments, so please give us more details and we will all chip in with some suggestions. My motives are a bit selfish; I hope to learn from your experiments as well.

By f/40, I assume you mean f/4? It is possible to take clear photos at all f stops, so it was probably just a focusing problem. The wider the f-stop, the smaller the depth of field, so precise focusing becomes critically important.

No, the aperture was set to f/40! Shutter speed was 1/2 a second which I think was where my problem arose. Of the ospreys are out this morning I'll crank it down to f/22 and gradually ruse from there. My experiment was with the hyperfocal distance focusing. From what I had been reading the higher the f-stop the better so I went really, really high!

Wow, none of my lenses has a stop smaller than f22. F40 is really very small. Which lens is that?

This one:
https://www.amazon.com/gp/aw/d/B00005Y3OM?psc=1&ref=yo_pop_mb_pd_title


But I'm thinking that the "limited compatibility" this lens has with my camera might be doing some wonky stuff. And there's supposed to be a dial or something to manually adjust the aperture that I can't find now that I'm looking for it! Could be a bad description.

Yeah, f45 min apperture! But no image stabilisation?

Which model do you have again? On my D5300 I select "A," hit the "info" button, use the "navigation" wheel to select the apperture dudplay then the thumbwheel (top right) to change that. The speed compensates automatically. "M"  allows you to change both and a scale at the bottom tells you how close you are to a viable combination so far as the lighting is concerned. Then you only have to choose between speed of subject and depth of field.

"Only"! Hah! That is the "art" bit!

Later

Here's another, quicker, wsy - I have learned something!


But that man's voice ! ! !

Pressing and holding the other top button allows speed adjustment on M in the same way.
« Last Edit: August 14, 2018, 10:10:47 PM by Dave »
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Re: Photography technical advice, questions, tips and techniques.
« Reply #146 on: August 14, 2018, 11:01:56 PM »

But that man's voice ! ! !


 :o Made me want to stick my head in a gas oven!
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hermes2015

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Re: Photography technical advice, questions, tips and techniques.
« Reply #147 on: August 15, 2018, 06:06:22 AM »
Well, it doesn't really matter that the photos are all jumbled up because my experiment with the maximum f-stop was a miserable failure. Turns out, f/40 isn't very good for taking clear photos...

One can learn a lot from failed experiments, so please give us more details and we will all chip in with some suggestions. My motives are a bit selfish; I hope to learn from your experiments as well.

By f/40, I assume you mean f/4? It is possible to take clear photos at all f stops, so it was probably just a focusing problem. The wider the f-stop, the smaller the depth of field, so precise focusing becomes critically important.

No, the aperture was set to f/40! Shutter speed was 1/2 a second which I think was where my problem arose. Of the ospreys are out this morning I'll crank it down to f/22 and gradually ruse from there. My experiment was with the hyperfocal distance focusing. From what I had been reading the higher the f-stop the better so I went really, really high!

Wow, none of my lenses has a stop smaller than f22. F40 is really very small. Which lens is that?

This one:
https://www.amazon.com/gp/aw/d/B00005Y3OM?psc=1&ref=yo_pop_mb_pd_title


But I'm thinking that the "limited compatibility" this lens has with my camera might be doing some wonky stuff. And there's supposed to be a dial or something to manually adjust the aperture that I can't find now that I'm looking for it! Could be a bad description.

That's odd, because according to Nikon, the minimum aperture is f/32.

https://www.nikonusa.com/en/nikon-products/product/camera-lenses/af-zoom-nikkor-70-300mm-f%252f4-5.6g.html#tab-ProductDetail-ProductTabs-TechSpecs

If the camera shows f/40, then there must be some incompatibility problem.

hermes2015

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Re: Photography technical advice, questions, tips and techniques.
« Reply #148 on: August 15, 2018, 06:11:45 AM »

But that man's voice ! ! !


 :o Made me want to stick my head in a gas oven!

Only a mother could love that voice.

Dave

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Re: Photography technical advice, questions, tips and techniques.
« Reply #149 on: August 15, 2018, 07:55:34 AM »
Hermes said:
Quote
That's odd, because according to Nikon, the minimum aperture is f/32.

https://www.nikonusa.com/en/nikon-products/product/camera-lenses/af-zoom-nikkor-70-300mm-f%252f4-5.6g.html#tab-ProductDetail-ProductTabs-TechSpecs

If the camera shows f/40, then there must be some incompatibility problem.

Hmm, I found  a spec for a .Nikkor 70-300mm  that gave f45 as the min, but no  inage stab.

But there is a VR model the quotes f32-40 for the zoom range:

https://imaging.nikon.com/lineup/lens/zoom/telephotozoom/af-s_vr_zoom70-300mmf_45-56g_if/index.htm

I have noticed there are various Nikkor models at the same focal length
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