SMC Pentax-A 28-80mm f3.5-4.5

conradj · 12-16-2010, 06:41 PM

Gee, what a very nice thing to say! Espesh as this version of the shot seems a lot less sharp than the original in my computer.

Here is a 100% crop from the good sample of the SMC-A 28-80mm, f11, 10s, -.7EV, ISO100. It's near the left edge of the frame, crop direct from camera JPEG saved with fine sharpness 2 turned full soft.

i'd say it's a pretty creditable showing. Thanks to Scottnorwo for telling me abt Picasa.

Edit: using a K-7

Last edited by conradj; 12-17-2010 at 09:51 PM.

conradj · 12-21-2010, 08:48 AM

Here's another test shot with this lens, hand held at f11, 1/50s, +.7EV, ISO100.

100% crop from the left edge of the frame, near the bottom:

This wasn't on the focus plane, just hangin' in somewhere within the f11 DOF.

As expected the lens is proving to be a bit hard to use because of the imperfect match of manual zoom to camera SR, and this was the one more-or-less clear shot i got that morning with it.

It's not the finestkind jim-dandy stuff of the gods, but i think that stuck on a monopod it has rez and other behavior that's perfectly usable in a general purpose zoom for people who like to have the option to enlarge the frame until they see bacteria from 6 feet away.

"My extra limited prime lens is way sharper, but hey, a zoom was easier."

SANDY1977 · 10-26-2012, 11:09 AM

hi,
I have bought this used lens ( SMC PENTAX-FA 1:3.5-5.6 28-80mm in verygood cosmetic & optic condition ) some days back on ebay.
I have a problem when i try to click a close object from this lens result is a dense foggy picture & in the same light conditions when i try to capture a distant object image comes perfect.
I am new to DSLR photography i guess this must be a setting error can someone help me regarding this ?

thanks

12-21-2010, 08:48 AM	#17
conradj Senior Member Join Date: Sep 2009 Photos: Albums Posts: 188 Original Poster	Here's another test shot with this lens, hand held at f11, 1/50s, +.7EV, ISO100. 100% crop from the left edge of the frame, near the bottom: This wasn't on the focus plane, just hangin' in somewhere within the f11 DOF. As expected the lens is proving to be a bit hard to use because of the imperfect match of manual zoom to camera SR, and this was the one more-or-less clear shot i got that morning with it. It's not the finestkind jim-dandy stuff of the gods, but i think that stuck on a monopod it has rez and other behavior that's perfectly usable in a general purpose zoom for people who like to have the option to enlarge the frame until they see bacteria from 6 feet away. "My extra limited prime lens is way sharper, but hey, a zoom was easier." Last edited by conradj; 12-21-2010 at 09:09 AM.

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12-16-2010, 06:41 PM	#16
conradj Senior Member Join Date: Sep 2009 Photos: Albums Posts: 188 Original Poster	Gee, what a very nice thing to say! Espesh as this version of the shot seems a lot less sharp than the original in my computer. Here is a 100% crop from the good sample of the SMC-A 28-80mm, f11, 10s, -.7EV, ISO100. It's near the left edge of the frame, crop direct from camera JPEG saved with fine sharpness 2 turned full soft. i'd say it's a pretty creditable showing. Thanks to Scottnorwo for telling me abt Picasa. Edit: using a K-7 Last edited by conradj; 12-17-2010 at 09:51 PM.

10-26-2012, 11:09 AM	#18
SANDY1977 New Member Join Date: Oct 2012 Posts: 12	hi, I have bought this used lens ( SMC PENTAX-FA 1:3.5-5.6 28-80mm in verygood cosmetic & optic condition ) some days back on ebay. I have a problem when i try to click a close object from this lens result is a dense foggy picture & in the same light conditions when i try to capture a distant object image comes perfect. I am new to DSLR photography i guess this must be a setting error can someone help me regarding this ? thanks