TelephotoTopcon
Product
RE Auto Topcor 200mm f/5.6 is a manual focus telephoto lens for full frame cameras.
Optical design
Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Not the best in low light conditions but the lack of high aperture can be compensated with higher iso
Physical characteristics
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TopconWide angle
Product
RE Auto-Topcor 25mm f/3.5 is a manual focus wide angle lens for full frame cameras.
Optical design
Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Average brightness in this league
Physical characteristics
With a lens filter diameter of 62 mm you are one step from the …
PrimeTopcon
Product
RE Auto-Topcor 135mm f/3.5 is a manual focus prime lens for full frame cameras.
Optical design
Average brightness in this league Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle.
Physical characteristics
87 mm long, requires consideration if you want to carry in the camera bag. Weights 400 …
TopconWide angle
Product
RE Topcor 28mm f. 2.8 is a manual focus wide angle lens for full frame cameras.
Optical design
Wide open, subjects located outside the depth of field are shown very blurred. Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle.
Topcon
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