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Forum: Pentax SLR Lens Discussion
05-04-2022, 10:53 PM
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For whoever is interested: I tested the SMC Pentax 28mm f/3.5 against the Mamiya E 28mm f/2.8. The link is here:
Mamiya Sekor E 28/2.8 vs SMC Pentax 28/3.5
I think this is an excellent lens, even on a 42+ mp sensor. I don’t share the view mentioned in this thread about this lens having significant field curvature. In fact, corners are already sharp at f/3.5 when centrally focused at a subject at infinity. Contrast, colors, flare resistance, build quality are all excellent.
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Forum: Pentax SLR Lens Discussion
02-16-2019, 09:55 AM
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I think the main difference between the Viv S1 and the Tokina is the coating, the latter being superior. And the overall lens body of the Tokina is smaller. The F/2.5 of the Tokina for me is wide enough to make nice portraits. I was lucky enough to find the Tokina including the 1:1 adapter.
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Forum: Pentax SLR Lens Discussion
02-16-2019, 08:26 AM
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How does the SMC Pentax 'K' 85mm f/1.8 hold up against the Tokina AT-X 90mm f/2.5, which is generally regarded as one of the best manual focus lenses one can get? I decided to do a quick test on my Sony A7.
I equally like both lenses, but I'm planning to buy a Sony 85mm f/1.8 (I take a lot of pictures of my son, but because he moves so much I find 75% of the pictures to be out of focus with a manual lens). So I was going to sell one of the two lenses, and did a quick test to make sure I would not regret my decision.
See for original link: http://www.fotothing.com/photos/d52/d528cf9833ae815dd42c93a589118867_5f3.jpg
First impression: hard to draw any conclusions. Bokeh is nice from both lenses.
Let's have a look at the 100% crops:
For full size crops eee for original link: http://www.fotothing.com/photos/e64/e64dce7770b14931252618ec34c3acb1_597.jpg
Sharpness and contrast of the Pentax are remarkably good @ F/1.8 I think. Results get better once stopped down a little. Both lenses are plenty sharp and contrasty; it seems they both outperform my sensor. Most remarkable difference is the DOF: at similar aperture settings the Pentax shows higher DOF. If this is due to the difference in focal length? My guess is that there is an actual difference in aperture.
For whoever is interested: I decided to sell the Pentax on Ebay. I still like both lenses, but the Tokina (being a macro lens) offers me a bit more flexibility.
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Forum: Welcomes and Introductions
08-11-2013, 02:30 PM
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O dear, you cannot even fit pentax lenses on it :-)
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Forum: Welcomes and Introductions
08-10-2013, 12:00 PM
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@Yos, I still have a Spotmatic :)
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Forum: Welcomes and Introductions
08-07-2013, 12:27 PM
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Hi everybody,
Like to introduce myself. I'm a 33 year old photography enthousiast and have used a lot of Pentax equipment already, other brands as well.
At the moment i use an olympus E-P1 together with several original m4/3 lenses but also several vintage lenses. Among them are several Takumar lenses (smc 135/2.5, super 35/2.0, smc 50/1.4). I love the way they are build, the smooth mechanics and still excellent optics. I hope to share my passion with other pentax enthousiasts, learn a bit more and hopefully help others!
See you around!
Casper, The Netherlands
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