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4

It takes a LOT of damage from scratches or fairly sizeable obstructions before they become noticeable! These photos from Roger Cicala's blog entry at lensrentals.com illustrate just how far a lens can be damaged or obstructed with very little impact on image quality. Although it is true that the coatings on the surfaces of lens elements that face other lens ...


2

I have access to a T-22 (similar to T-43). The flange focal distance is very short. It can be used as a close-up or macro lens on SLRs, but will not be able to focus to infinity. Teleconverters are designed to work with lenses that have FFD that match your camera. Since the T-43 has a shorter FFD, it's unlikely to work. I tried the T-22 with an OM mount ...


0

English language is particularly confusing regarding optical assemblies, especially in the context of photography... "Lens" indeed refers to the whole group of lenses (interchangeable or not) attached to the camera ... in microscopy and astronomy, this would be more formally called an "objective" (describing the sum of glass parts that AREN'T part of the ...


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I'm pretty sure it's not Pentax K (PK) mount. It might be Nikon F (NF) mount. All of the control and communication linkages are missing, but the page you link seems to indicate this is normal for that lens. The alignment dot has the same position as NF. The locking slots are located between the flanges, like NF. The slot would adjacent to one of the ...


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