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Latest Review Posted SMC Pentax-A* 645 600mm F5.6 ED [IF]
This is only an initial review which I will edit with more experience with it. I have been using the lens now for 2.5 months. Build: Top end build. Great handling for such a lens. Pentax really paid attention to the details with this lens. I don't know what more to mention other than there is nothing I would change on the design and construction of the lens. The double extending hood provides spectacular protection. The top handle is a huge asset. This is a super aid in handling the lens and moving it around quickly. The handle even has a nice groove down the top to assist in rapidly locating your subject. Focusing is smooth as could be. I almost wish it was dampened it is so smooth. The focus preset is a great advantage. Infinity changes on this lens depending on your conditions. I use the focus preset to lock infinity for the environmental conditions of each shoot. Rotating between vertical and horizontal is a great design. The top handle stays at the top no matter if the camera is set to landscape or portrait. Only the rear grey portion rotates. Filter drawer stays locked closed and does not accidentally come loose like the k mount FA*s. Lens foot is very beefy and solid, does not induce as much vibrations from the foot as other FA, A, Nikon, and Canon counterparts. Image Quality: This lens has it with proper technique. Sharpness is great. Aberrations are very well controlled and the small amount is easily correctable. A word on technique though, fas...

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