June 1975 - 40th Anniversary of K-Mount/K Series

**ChrisPlatt** · 07-09-2015, 03:50 PM

Originally posted by gofour3

K300/2

The tough part is deciding which eye of your subject you want in focus...

Chris

fuent104 · 07-09-2015, 05:15 PM

Originally posted by ChrisPlatt

The tough part is deciding which eye of your subject you want in focus...

Chris

It depends on the magnification of your subject in the frame. Depth of field is much more dependent on magnification and f-stop than on focal length.

**ChrisPlatt** · 07-11-2015, 04:55 PM

Originally posted by fuent104

It depends on the magnification of your subject in the frame. Depth of field is much more dependent on magnification and f-stop than on focal length.

Theoretically correct. And by extension a single fixed focal length lens should suffice for any photographer!

Chris

mee · 07-11-2015, 05:14 PM

Originally posted by gofour3

Yes 26, but 25 were based on SMC Takumars lenses redesigned into K-Mount versions.

The brand new lens was of course the legendary K50/1.2, which there was no SMC Takumar version.

ahh that seems more understandable to me!

fuent104 · 07-12-2015, 01:08 PM

Originally posted by ChrisPlatt

Theoretically correct. And by extension a single fixed focal length lens should suffice for any photographer!

Chris

I don't understand what you are saying. You seemed to imply that shooting with a long fast lens would necessarily result in extremely shallow depth of field. I pointed out that it would not. we see this frequently in sports photography. Using a long lens for a full-body shot of a person is not an esoteric thing.

That is in no way an implication that all focal lengths are equal.

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07-09-2015, 03:50 PM	#46
ChrisPlatt Site Supporter Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,696	Originally posted by gofour3 K300/2 The tough part is deciding which eye of your subject you want in focus... Chris

07-09-2015, 05:15 PM	#47
fuent104 Veteran Member Join Date: Apr 2011 Location: California Photos: Gallery Posts: 1,356	Originally posted by ChrisPlatt The tough part is deciding which eye of your subject you want in focus... Chris It depends on the magnification of your subject in the frame. Depth of field is much more dependent on magnification and f-stop than on focal length.

07-11-2015, 04:55 PM	#48
ChrisPlatt Site Supporter Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,696	Originally posted by fuent104 It depends on the magnification of your subject in the frame. Depth of field is much more dependent on magnification and f-stop than on focal length. Theoretically correct. And by extension a single fixed focal length lens should suffice for any photographer! Chris

07-11-2015, 05:14 PM	#49
mee Veteran Member Join Date: May 2010 Posts: 7,403	Originally posted by gofour3 Yes 26, but 25 were based on SMC Takumars lenses redesigned into K-Mount versions. The brand new lens was of course the legendary K50/1.2, which there was no SMC Takumar version. ahh that seems more understandable to me!

07-12-2015, 01:08 PM	#50
fuent104 Veteran Member Join Date: Apr 2011 Location: California Photos: Gallery Posts: 1,356	Originally posted by ChrisPlatt Theoretically correct. And by extension a single fixed focal length lens should suffice for any photographer! Chris I don't understand what you are saying. You seemed to imply that shooting with a long fast lens would necessarily result in extremely shallow depth of field. I pointed out that it would not. we see this frequently in sports photography. Using a long lens for a full-body shot of a person is not an esoteric thing. That is in no way an implication that all focal lengths are equal.