Someone tell me I don't need a SMC-K 50mm f1.2


George in Georgia USA

Link Posted 10/03/2010 - 16:56
I have the 50mm f1.2A which I bought some years ago with my used LX. Its a lovely lens, not razor sharp at 1.2, but very good by 1.4. The bokeh is nice. On my K10d it makes a superlative portrait lens, focusing via the viewfinder indicator is adequate, although I'd suggest a KatzEye screen for easier use. Don't forget, at 1.2 depth of field is miniscule, maybe 1/4 inch at 5 feet. Watch for a lovely fitted shade from Pentax for the 1.2, it snaps on and can be reversed for storage.

I wouldn't advise other than the A version! I have a 135mm f2.5 Takumar which I have to use on the K10 in stop-down, a real pain! Additionally stop-down would negate the advantage of the 1.2 in candid work, at which it excels. And of course, there's the undeniable bragging rights factor, if that floats your boat. I, of course, am immune to such juvenile concerns, LOL!

bretbysteve

Link Posted 10/03/2010 - 18:47
"and I find it too zoomed up!"

...what does that mean?

mikew

Link Posted 10/03/2010 - 19:44
bretbysteve wrote:
"and I find it too zoomed up!"

...what does that mean?

Nothing IMO - but I can guess.
---------------------------------------------------

You can see some of my shots at my Flickr account.

whelmed

Link Posted 10/03/2010 - 20:21
Well I find the effective focal length too long - it is basically is behaving as a a 75mm on my dSLR.

Thanks for the links re the photo stuff, I knew most of that, but hadn't thought that the DOF / lens behaviour was the same as a 50mm. It makes sense, as it's just a crop of the FF so that was some good knowledge to have.

for now
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8

Anvh

Link Posted 10/03/2010 - 20:52
whelmed wrote:
Thanks for the links re the photo stuff, I knew most of that, but hadn't thought that the DOF / lens behaviour was the same as a 50mm. It makes sense, as it's just a crop of the FF so that was some good knowledge to have.

It seems you're up to it so I'm going to say that you are not right, you're forgetting the circle of confusion therefore the DOF is not the same on an APS-C as on a FF with equal focal lengths and focus point unless you crop the FF to APS-C size of course.

Could you follow me
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

whelmed

Link Posted 10/03/2010 - 21:12
I'm lazy, I just use http://www.dofmaster.com/dofjs.html to figure out what I need
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8

Anvh

Link Posted 10/03/2010 - 21:20
Yeah that's super, I believe you also have that for your mobile phone now

If you change camera from FF to APS-C you will see the DOF change while the lens and focus distance stays the same.
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

whelmed

Link Posted 10/03/2010 - 22:21
Well they do have it for the iphone And yeah, http://www.bobatkins.com/photography/technical/digitaldof.html was a great link, thanks for that!
K-5; Siggy 10-20 f4, 30mm f1.4, 18-50mm f2.8, 70-200mm f2.8; Tammy 400mm f4, 500mm f8

womble

Link Posted 11/03/2010 - 02:28
I bought the K series 50mm f/1.2 attached to a Pentax ME about six months ago with every intention of selling it. I still have it and have no intention of getting rid of it. This was taken with it.

K.
Kris Lockyear
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.

My website

Mongoose

Link Posted 11/03/2010 - 08:19
whelmed wrote:
Well I find the effective focal length too long - it is basically is behaving as a a 75mm on my dSLR.

Thanks for the links re the photo stuff, I knew most of that, but hadn't thought that the DOF / lens behaviour was the same as a 50mm. It makes sense, as it's just a crop of the FF so that was some good knowledge to have.

for now

in that case the Sigma 30mm F1.4 might be more useful to you
you don't have to be mad to post here



but it does help

Transit

Link Posted 11/03/2010 - 09:38
whelmed wrote:
Gah, someone has a SMC-K 50mm f1.2 in great condition and wants 300GBP for it... I've already got a FA50 f1.4, and I find it too zoomed up!

Someone, tell me I don't need this (and by someone, I don't mean my wife)

You don't need it.
Pete


K-1 K-01 Q-7
some len

Close to the Edge
Down by the River
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