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01-01-2008, 08:57 AM   #16
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My motivation for having primes isn't sharpness. They may be sharper but my zooms are adquate in sharpness for my needs. Primes are faster. I love my f/1.7 50mm and my f/2 35mm. I don't know of a zoom that's f/1.7 for my Pentax.

01-01-2008, 09:07 AM   #17
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QuoteOriginally posted by pentkon52 Quote
I have noticed some very nice photos over at Pentaxgallery, that had used the 18-55.

I have no idea what post processing may have been done, if any, but it seems to be a decent kit lens.

Dave
I find that if I want the best possible performance from the kit lens I stick it on 35mm at f/5.6 - F/8.0 - Nice 'sweet spot' there. In fact at that setting it performs as well or better than the 16-45mm - go figure.

cheers,
Rick
01-04-2008, 01:58 PM   #18
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Everyone,

Thanks for the comments.

Have been offline since posting so will try to answer all your questions, comments...

First I do not know anyone who has a K10D and have never seen either a RAW or RAW to TIFF photo from it. The only K10D photos I have downloaded and examined have been JPEGs so do not know if the things noticed are compression artifacts.

The K10D lists a "22-bit ADC" Pentax K10D Review: 2. Specifications: Digital Photography Review vs 8-bit for JPEGs. How much difference this makes I do not know? But why not test the K10D at its best and use RAW?

The only somewhat comparable JPEGs for 10 MP DSLRs I know of are at Digital Cameras, Digital Camera Reviews - The Imaging Resource! and Steve's Digicams - Main Menu If anyone knows of other review sites that use the same subjects for each camera review I would be very interested.

I hope that someone here with a K10D and access to other lenses has tested to see if there is a noticeable increase in RAW photo resolution by using prime lenses vs the kit zoom.

Thanks again everyone for your interest and comments.

Steve
01-04-2008, 06:31 PM   #19
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I have a Pentax 16-45mm zoom and the 31mm Limited. On comparing the limited to the zoom at 31mm and the same stop I can say that the Limited is better, but not twice as better. I've found the 16-45mm to be a very good walk around lens and very good for the price. I love my 31mm Limited, but I'm still trying to justify the cost.

01-04-2008, 08:02 PM   #20
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I don't have the kit lens or the 31mm, but here's a few 100% crops that may help. They have all been processed in lightroom (including sharpening). All were taken with the same K10D. I prefer prime lenses over zooms, but I haven't used the Pentax zooms much.

Pentax 50-200/4-5.6 (200mm @ f/5.6)


Pentax 77mm/1.8 (77mm @ f/4)


Voigtlander 180/4 (180mm @ f/4)


Nikon 55/3.5
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