Originally posted by summonbaka Yeah, bracketing with my K-m has made me find out about that same thing. When you bracket in M mode (I don't remember other modes) for 1-stop increments it will change half a stop for speed and aperture, effectively changing the DoF. I think I get what you mean, it's a little annoying.
Yes, exactly! Oh, it is like a cool summer breeze when someone groks it!
Originally posted by summonbaka I believe that to change and de-cripple the lens could be a mechanically destructive operation...
Well, if I had a full-frame body, I'd be doing this to the lens:
Intricate panography Originally posted by drougge Ok, in my first reply I didn't understand AEB (I read it as "auto exposure button" and took that to mean green button), but if you follow my instructions in it at least the K20D really does only vary the shutter speed for bracketing in M mode. (But you do have to set custom function 26 "Green button in TAv & M mode" to 2 "Tv shift", if your camera doesn't have this setting I guess you need a new camera.)
Oh, thank you drougge! That does
exactly what I want (and go figure, I never imagined that "Green button" in that C-function also meant "AEB"! I wonder if that's "in the manual?")... no harm done to the lens at all.
Originally posted by drougge As Steinback says, the Samyang 8mm has an aperture ring. (And gives the same field of view as your DA at 10mm, with a slightly different projection.)
And if none of this gives you satisfaction, just use M mode and change the shutter speed yourself, it's not that bad.
Haven't tried the Samyang and its "interesting" projection (but hey, why not add another fisheye to add to my collection!), but it seems like your Custom Function 26 suggestion is doing what I want in "M" with the familiar 10-17mm.
And, yes, I spent years and years changing the shutter speed myself on my Canons before their firmware SDK was released. However, that remains a PITA if you are shooting brackets where *anything at all* is moving (people, clouds, etc.) and seriously increases the chance that you will move your camera or bump the tripod and get mis-registration in your brackets (also the reason for my gripe about MLU in AEB!).
So glad you also grokked the problem, and knew the (in-body) solution! I may know a lot about many things, but there is always someone who knows more.
(Now retiring to the shadows to further test this out...)