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01-27-2013, 09:21 AM   #31
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QuoteOriginally posted by NitroDC Quote
Ah, so that doesn't mean that the viewfinder is always affected by the aperture setting? Only when pressing the green button/shutter?
Right. The lens is wide open to aid in viewing & focusing. Pressing the green button closes the aperture momentarily to your setting on the ring. The camera then takes a light reading, and calculates shutter speed.

01-27-2013, 09:24 AM   #32
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QuoteOriginally posted by paulh Quote
Right. The lens is wide open to aid in viewing & focusing. Pressing the green button closes the aperture momentarily to your setting on the ring. The camera then takes a light reading, and calculates shutter speed.
Ah. I was just confused because I've seen multiple posts say that metering is more difficult with an M lens because of stop-down metering (and I didn't know what that meant ). I always thought it was pretty easy and quick to use the green button.
01-27-2013, 09:28 AM   #33
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QuoteOriginally posted by NitroDC Quote
Ah. I was just confused because I've seen multiple posts say that metering is more difficult with an M lens because of stop-down metering (and I didn't know what that meant ). I always thought it was pretty easy and quick to use the green button.
Well, for some folks, that extra step of using the green button is a hassle - but it doesn't trouble me much at all. And if your lighting hasn't changed, you don't need to press it again from shot to shot. For action shooting, I could see where it could be a problem, though.
01-27-2013, 10:18 AM   #34
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If you don't even understand how to shoot in manual exposure and don't really get the difference between an A and an M lens, then for God's sake don't go butchering perfectly good lenses. Spend a little time learning how to use the gear instead of destroying it.

01-27-2013, 01:03 PM   #35
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in my opinion there's no difficulty associated with using and lenses at all. Virtually every picture I've ever taken was with an M lens.
01-27-2013, 02:28 PM   #36
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I didn't know anything about anything when I bought my first camera, but I really wanted to learn exposure, so I bought an M50/1.7 and set my camera to M mode and spent about a week just figuring it out. These days, I far prefer to shoot in M for the maximum control it affords me. Green button and/or the exposure meter bar are going to be very useful for you, just dig in, you will learn it and then you'll never forget it.
01-27-2013, 02:41 PM   #37
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QuoteOriginally posted by fuent104 Quote
in my opinion there's no difficulty associated with using and lenses at all. Virtually every picture I've ever taken was with an M lens.
I will let you know how I get on trying manual, thx for all the suggestions, I have a lot to learn..
01-27-2013, 02:45 PM   #38
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It takes you like.. a day of shooting manual to get the hang of it. A little longer to master it. Maybe a couple different manual lenses (all manual, A-contact, preset..) to find all the quirks and get a wide knowledge on manual lenses.

On the other hand, there are some Pentaxians on these forums that take really amazing photos with old manual lenses and sometimes I think I'll never reach their skill.


Last edited by Na Horuk; 01-27-2013 at 02:51 PM.
01-27-2013, 03:54 PM   #39
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More often than not I find M lenses underexpose somewhat, even if there's uniform lighting in the subject field.
01-27-2013, 04:13 PM   #40
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QuoteOriginally posted by arcturus Quote
More often than not I find M lenses underexpose somewhat, even if there's uniform lighting in the subject field.
If you use a m42 lens, then you can use Av mode and using +/- EV to adjust accordingly. Also, if you want to use the manual lens a couple of stops down (for example, f2 on f1.4 lens, then m42 lens also give the advantage. If you want to use the manual lens for video, then obviously not having to press "green button" would be an advantage as well. Note, not all m42 lens has the A/M switch, some adjustment has to be made to the ones without the switch to put it in M (aperture opening) mode.
01-27-2013, 07:32 PM   #41
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QuoteOriginally posted by arcturus Quote
More often than not I find M lenses underexpose somewhat, even if there's uniform lighting in the subject field.
I prefer to make all image-related decisions myself, so I very rarely use the green button - almost never, actually. I usually just snap a shot, check out the image, and make exposure decisions based on my emotional response to the image / the histogram. The process of deciding on exposure never takes a long time. It does add a step or two to the process, but it is well worth it for me to have access to my M50 f1.4 and my M85 f2.

It is also worth noting that I expect to spend a lot of time doing post work on my images, so I don't expect to create finished images in camera.
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