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View Poll Results: How (IF?) do you use the Digital/Optical Preview feature?
Custom Settings are set to OPTICAL Preview (default setting) 5056.18%
Custom Settings are set to DIGITAL Preview 2224.72%
I know what these are, but do not use them 1112.36%
I do not use Digital or Optical Preview because I dont know what they are! 66.74%
Voters: 89. You may not vote on this poll

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04-24-2008, 11:44 PM   #16
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I normally go for digital preview, I find it more useful as I only use manual lenses.

François

04-25-2008, 08:03 AM   #17
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Lucky sky, know that works on K20Dand K200D. Didn't on K10D (unless that got fixed in later firmware).
thanks
barondla
would still like to make the raw button switch between optical and liveview.
04-25-2008, 09:26 AM   #18
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QuoteOriginally posted by ricardobeat Quote
That's because the lens is already wide open. What you see on the viewfinder is always the lens at the largest aperture, it only stops down while taking the picture, hence the need for DOF preview!
QuoteOriginally posted by ManWithCamera Quote
You will never see a reduction in depth of field when using the DOF preview -- you will only see a greater depth of field (assuming that you are stopping down). Your aperture is always wide open until you take the shot, so you will be looking at the minimum depth of field unless you are using the DOF preview.

There was a link posted on here a couple days about about why MF sucks with digital cameras. Apparently one of the issues is that the focusing screens. They are optimized to give max viewfinder brightness at smaller aperture. Apparently they are cast with micro lenses on the view finder to achieve this. On my k10d I went the tried with the optical preview and couldn't see any difference stopping down a f1.8 lens to f2.8 while I could see a difference going to smaller apertures, or using lenses that have a small max aperture to begin with.

So in addition to this phenomena with optical preview, I've noticed that that DOF on very large aperture lenses does not appear as small in the viewfinder as it does in the resulting image. This is something I noticed before reading the article.

So either my eyes are playing tricks on me, or the article was right.
04-25-2008, 09:44 AM   #19
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I have digital preview set with both the histogram and "blinkies" checked but I rarely use it. As for depth of field, the only lenses I use on my K10D are the 21mm DA and the 70mm DA, both of which have depth of field scales.

Richard

04-25-2008, 10:46 AM   #20
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Both should be allowed without changing custom settings...

I'd like to see an additional position on the lever so that it would first stop down for optical preview and only if I turn it beyond (I should be able to feel a tactile difference in the lever) should it capture the digital preview. Digital preview is good for white balance and possibly focus etc. but l don't want to give up the traditional optical preview in the viewfinder. It should of course be possible to save the digital preview to the card if desired.
04-25-2008, 11:09 AM   #21
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My old Film SLR's had the DOF preview on them, so I use the switch. With digital preview - the LCD is not viable. I am very near sighted - so if I use the LCD with my glasses I have to hold it 2 feet away to see the D*mn thing. If I take my glasses off - I have to be within 3-4 inches to see the D*mn thing and I can clearly see the black lines between the 'pixels' - so the resolution really s*cks. (Another reason to not use "Live-View" if I ever get a K20D or higher).

I have spent a lot of "quality time" with the DoF dial from DoFMaster and now have a reasonable idea of where the DoF lies with my set of lenses. The swith is just used to validate my assuptions - or to correct them when I take the time to "think" about what I am doing (pretty rare these days).

The Elitist - formerly known as PDL
04-25-2008, 11:11 AM   #22
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Wouldn't it be nice if you could set the digital preview to automatically zoom to a 100% crop of the selected af point?
04-25-2008, 11:40 AM   #23
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QuoteOriginally posted by Geekybiker Quote
Wouldn't it be nice if you could set the digital preview to automatically zoom to a 100% crop of the selected af point?
Yes, that would be nice.


I don't use the preview feature very much. I've played with it, know what it is, just don't really see the point. If I have doubts, I just take the photo, and then look at it; or I take a shot, change something (focus, exposure, whatever), take another shot; and sort 'em out on the computer.

Will

04-25-2008, 05:05 PM   #24
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Used to use the optical preview (stop down switch) a lot when shooting film to check DOF. Frankly I use it very rarely now and choose digital preview. I find it actually faster to shoot a frame and set the playback magnification to 6-8x to check focus/sharpness. No right or wrong but depends on user preferences.
04-28-2008, 02:29 AM   #25
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I don't use them

On autofocus cameras optical DOF preview shows much larger DOF than you get in the picture. Therefore not much sence in using it.

Also I don't use digital DOF. I just take picture. If DOF seems not OK I just change aperture and retake the picture.
04-28-2008, 06:58 AM   #26
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QuoteOriginally posted by Edvinas Quote
On autofocus cameras optical DOF preview shows much larger DOF than you get in the picture. Therefore not much sence in using it.

Also I don't use digital DOF. I just take picture. If DOF seems not OK I just change aperture and retake the picture.
I tend to agree.
But optical preview is good for a quick check, or let me say, better than nothing. It gives me a rough idea of the DOF. When DOF is critical, then I check the picture after exposure.
04-28-2008, 09:02 AM   #27
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optical for me. digital shows up as an shutter count everytime you use it.
04-28-2008, 10:37 AM   #28
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My K10D is on digital.
I use this for a general preview more than DOF preview.
Like Oldtimer 56 it shows extreme exposures and I check the composition etc.

- Bert
04-28-2008, 02:52 PM   #29
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QuoteOriginally posted by Geekybiker Quote
Wouldn't it be nice if you could set the digital preview to automatically zoom to a 100% crop of the selected af point?
A reasonable option, but wouldn't do much good for those of us who always use the center AF point and re-compose.
04-29-2008, 11:16 PM   #30
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I'm an old film shooter so I use DOF quite alot.
Mine is always set that way.
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