Time to be with your loved ones

Time to be with loved ones

by sat

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visits member for 1 year, 6 months
seen Apr 15 at 11:00

I'm a technician, not a photographer.


Mar
29
answered Are these weirdly-shaped purple stains really from particles under the first layer of the sensor, and if so, what can I do about it?
Mar
26
comment Why do depth of field calculators show *more* DOF for larger formats with the same lens parameters?
That's interesting. I was sure that the hyper focal distance and the circle of confusion were what you were missing. Either I read your question wrong or it's also right but mattdm's answer just made more sense. In any case, I think it's a good question. +1
Mar
26
comment Why do depth of field calculators show *more* DOF for larger formats with the same lens parameters?
Thanks. Seeing as everyone complained about them, I removed them and changed my answer. Hope I made it clearer.
Mar
26
revised Why do depth of field calculators show *more* DOF for larger formats with the same lens parameters?
added 814 characters in body
Mar
26
comment Why do depth of field calculators show *more* DOF for larger formats with the same lens parameters?
Not once does he say that he wants to keep the same field of view. If you simply change the format size, the DoF increases. The DoF calculators don't take into account field of view. Yes, changing subject distance and/or focal length to get equivalent FoV then changes the DoF. So, 50mm @ f/1.8 at 5m on 4/3 will yield similar results than 50mm @ f/3.6 at 2.5m on 135 (or 100mm @ f/3.6 at 5m). He isn't asking that, though. Explain why (DON'T WORRY ABOUT EQUIVALENT FOV!!) "35mm at 6.29 and... 5"x4" at 34.6" happens. I think I'll change around my answer, anyway.
Mar
25
comment Why do depth of field calculators show *more* DOF for larger formats with the same lens parameters?
The whole question isn't about the same field of view. Don't you get it?
Mar
25
comment Why do depth of field calculators show *more* DOF for larger formats with the same lens parameters?
I think he is missing the circle of confusion that gets taken into account in the formula. How else can you explain " 35mm at 6.29 and... 5"x4" at 34.6?
Mar
25
comment Why do depth of field calculators show *more* DOF for larger formats with the same lens parameters?
Thanks Matt, for totally ignoring the person's question.
Mar
25
answered Why do depth of field calculators show *more* DOF for larger formats with the same lens parameters?
Mar
25
comment What can cause massive overexposure on a Canon PowerShot A470?
Because it's not using the mechanical shutter in video mode. It could be repairable (simply a stuck shutter lever) but who can be bothered dismantling a compact lens these days?
Mar
24
comment What can cause massive overexposure on a Canon PowerShot A470?
Highly likely a faulty lens.
Mar
19
answered Is it ok to breathe on the front glass element of a lens to fog it and clean it?
Mar
18
comment What are the pixel needs for huge prints?
This is brilliant! Raises the viewing distance but also addresses it technically. Love it!
Mar
13
answered Camera displaying “subject is too dark” message when live view turned off
Mar
6
comment What's the difference between P mode vs. Av or Tv?
Sure. But I think it's easier to use Av, Tv or M. I'll update my answer because I've learnt about Program Shift.
Mar
5
comment What's the best bang for your buck to improve low light portrait shots: Lens, Flash or Body?
Are they all the same girl? They grow up fast!
Mar
4
comment How to test the autofocus system before asking for support?
You don't have to whine. You can nicely say you think there are problems with AF and that you'd appreciate a focus adjustment on it. Also tell them the conditions, eg. when zoomed in. If anything else, ask them to show you one of the same model and compare them.
Mar
4
comment How could film compact cameras set exposure?
How can we be sure? As it could be argued that just as many did. Do you have numbers? An easier way to find out (as in my comment above) would be to see if it at least used a battery. Even ones that used a battery could be used without one. I guess the answer is, if it didn't use batteries, you couldn't set the exposure as it was fixed. <- Sorry, that's not enturely true either. I mean, if it didn't have electronics and there were no modes/dials for settings, then it couldn't auto expose.
Mar
4
comment How could film compact cameras set exposure?
Can you at least remember if it had batteries? It was pretty common for compact cameras to use batteries but would be great if you could find out if it did or not.
Mar
4
comment How could film compact cameras set exposure?
Film cameras could still (yes, depending on the model) analogously metre the light and auto expose. They still had electronics, it just wasn't digital. Upvoting, not because it's entirely correct but because it has 2 downvotes that aren't really needed. Just a no vote is fine.