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Forum: Pentax SLR Lens Discussion
11-01-2018, 06:29 AM
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Both my K-1's are off for upgrade service. When they get back I'll do a comparo with my A* and the Samyang.
i will say this: I'm on my third copy of the Samyang. The first two had easily visible uneven sharpness between the left and right sides. My third one has a hint of astigmatism. I'm probably unlucky in this respect but none the less, when you are making financial and time calculations, keep in mind that the Samyangs may have the "hidden" cost thus mentioned. My time is valuable, and it's worth a certain amount of money to me to not have to goof around with multiple copies just to get a solid one.
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Forum: Pentax SLR Lens Discussion
07-03-2017, 12:44 PM
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I own both the Pentax A* 135/1.8 as well as the Samyang 135mm F2. While I have yet to have time to do a strict head-to-head comparison, there one attribute that is important to me that I have never seen mentioned in any discussion or any review anywhere. That is the transmittance. The Pentax has much more transmittance at F2 than the Sanyang at F2 And at F1.8, due to the greater transmittance, the Pentax is far better in very low light situations. Much more so that it would be apparent if you were only looking at the specifications. The Samyang has a little better bokeh for branch-y objects at very far distances. The Pentax has outstanding bokeh at near to medium distances. It may be a month or two before I can do a shootout. I'll post one as soon as I can.
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