Topcon
Cima Kōgaku Co. Ltd., a Japanese company, remains relatively obscure, with limited information available on its history. The company mainly produced lenses for other brands, such as Chinon, Hanimex, Lentar, Photax, and Focal. In addition to manufacturing for these brands, Cima Kōgaku marketed products under its own name, Cimko, and through its virtual brands, including Paragon and Beroflex.
Partnerships and Notable Products
Beyond producing lenses, Cima Kōgaku collaborated with Topcon, manufacturing both lenses and camera bodies for the brand, such as the Topcon RM 300 series. They produced notable lenses like the AM Topcor 55mm f/1.7 and the Topcor RE 28mm f/2.8 for Topcon, demonstrating a versatile manufacturing capacity that supported a wide range of photographic equipment.
Innovations and Optical Design Approach
Similar to many industry players of the era, Cimko aimed to design and produce universal optical formulas. These designs could be adapted across different brands and camera mounts, maximizing compatibility with the numerous SLR systems on the market and reaching a broad consumer base. This strategy enabled Cimko to appeal to a wider range of photographers by offering versatile lenses that fit various brands and mounts.
Market Reach and Brand Philosophy
The Paragon and other Cimko-related brands were targeted at amateur and budget-conscious photographers who valued versatility and affordability. Through partnerships with well-known brands and the production of universal lenses, Cima Kōgaku effectively positioned itself as a reliable source of accessible optics during the heyday of film photography.
Topcon Lenses
35KP 100mm f/1.8
~$56
35KP 100mm f/1.8 is a manual focus prime lens for aps-c cameras.<p><b>Optical design</b></p>Full frame equivalent focal length is 150.0 mm. Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open. Wide open, subjects located outside the depth of field are shown very blurred.<p><b>Physical characteristics</b></p>Weights 772 grams so it is a heavy lens, consider using its own lens bag. 100 mm long, requires consideration if you want to carry in the camera bag.
35KP 120mm f/1.8
~$91
35KP 120mm f/1.8 is a manual focus prime lens for aps-c cameras.<p><b>Optical design</b></p>Wide open, subjects located outside the depth of field are shown very blurred. Full frame equivalent focal length is 180.0 mm. Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open.<p><b>Physical characteristics</b></p>118 mm long, requires consideration if you want to carry in the camera bag.
35KP 65mm f/1.8
~$277
35KP 65mm f/1.8 is a manual focus prime lens for full frame cameras.<p><b>Optical design</b></p>Wide open, subjects located outside the depth of field are shown very blurred. Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open.<p><b>Physical characteristics</b></p>80 mm long, requires consideration if you want to carry in the camera bag.
35KP 70mm f/1.8
~$39
35KP 70mm f/1.8 is a manual focus prime lens for full frame cameras.<p><b>Optical design</b></p>Wide open, subjects located outside the depth of field are shown very blurred. Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open.
35KP 75mm f/1.8
~$68
35KP 75mm f/1.8 is a manual focus prime lens for aps-c cameras.<p><b>Optical design</b></p>Full frame equivalent focal length is 112.5 mm. Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open. Wide open, subjects located outside the depth of field are shown very blurred.<p><b>Physical characteristics</b></p>92 mm long, requires consideration if you want to carry in the camera bag.
3M-5A-MC 500mm f/8
~$216
3M-5A-MC 500mm f/8 is a manual focus super telephoto lens for full frame cameras.<p><b>Optical design</b></p>Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open.<p><b>Physical characteristics</b></p>Weights 1225 grams so it is a heavy lens, consider using its own lens bag. With a lens filter diameter of 77 mm this lens deserves a good quality filter, this is commonly filter size, provides a range of filter options. 152 mm long, with this size carry only if you use it.
3M-5SA MC 500mm f/8.0
~$86
3M-5SA MC 500mm f/8.0 is a manual focus super telephoto lens for full frame cameras.<p><b>Optical design</b></p>Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open.<p><b>Physical characteristics</b></p> With a lens filter diameter of 72 mm you are one step from the next standard filter size, buy step-up ring and bigger filter but you can chose from plenty options. Weights 620 grams so it is a heavy lens, consider using its own lens bag. 139 mm long, with this size carry only if you use it.
3M-6A 500mm f/6.3
~$255
3M-6A 500mm f/6.3 is a manual focus super telephoto lens for full frame cameras.<p><b>Optical design</b></p>Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open.<p><b>Physical characteristics</b></p>163 mm long, with this size carry only if you use it. Weights 1400 grams so it is a heavy lens, consider using its own lens bag. With a lens filter diameter of 95 mm finding lens filters in this range can be expensive consider using Cokin P system if you really need one.
3M-7 300mm f/5.6
~$331
3M-7 300mm f/5.6 is a manual focus ultra telephoto lens for full frame cameras.<p><b>Optical design</b></p>Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open. Not the best in low light conditions but the lack of high aperture can be compensated with higher iso<p><b>Physical characteristics</b></p> With a lens filter diameter of 67 mm commonly filter size, gives you a variety of filter options. Weights 470 grams so plan ahead, carry only if really necessary. 81 mm long, requires consideration if you want to carry in the camera bag.
3M-7K 300mm f/5.6 MC
~$345
3M-7K 300mm f/5.6 MC is a manual focus ultra telephoto lens for full frame cameras.<p><b>Optical design</b></p>Not the best in low light conditions but the lack of high aperture can be compensated with higher iso Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open.<p><b>Physical characteristics</b></p>Weights 470 grams so plan ahead, carry only if really necessary. 75 mm long, requires consideration if you want to carry in the camera bag. With a lens filter diameter of 67 mm commonly filter size, offers a wide range of filter options.
7Artisans 12mm f/2.8
~$161
7Artisans 12mm f/2.8 is a manual focus ultra-wide lens for aps-c cameras.<p><b>Optical design</b></p>Has 7 aperture blades, mid-grade lenses usually have this amount of blades. Having rounded blades provides out of focus circle shape closer to a circle. Full frame equivalent focal length is 18.0 mm. Bright lens thanks to the high aperture value<p><b>Physical characteristics</b></p>Weights 265 grams so consider putting to your camera bag. 62 mm long, this small lens should be always in the camera bag. With a lens filter diameter of 43 mm you are one step from the next standard filter size, buy step-up ring and bigger filter but you can chose from plenty options.
7Artisans 15mm f/4
~$292
7Artisans 15mm f/4 is a manual focus ultra-wide lens for full frame cameras.<p><b>Optical design</b></p>Has 10 aperture blades, this lens has a beautiful bokeh. Average brightness in this league<p><b>Physical characteristics</b></p> With a lens filter diameter of 77 mm this lens deserves a good quality filter, this is commonly filter size, provides a range of filter options. 100 mm long, requires consideration if you want to carry in the camera bag. Weights 536 grams so plan ahead, carry only if really necessary.
7Artisans 18mm f/6.3 UFO
~$53
7Artisans 18mm f/6.3 UFO is a manual focus wide angle lens for aps-c cameras.<p><b>Optical design</b></p>Has no aperture blades, this is among the rare lens which does not have aperture control function, works always wide open. Full frame equivalent focal length is 27.0 mm.<p><b>Physical characteristics</b></p>Weights 49 grams so convinient to carry. 10 mm long, this small lens should be always in the camera bag.
7Artisans 25mm f/0.95
~$299
7Artisans 25mm f/0.95 is a manual focus wide angle lens for aps-c cameras.<p><b>Optical design</b></p>Has 13 aperture blades, this lens has a beautiful bokeh. Wide open, subjects located outside the depth of field are shown very blurred. Full frame equivalent focal length is 37.5 mm.<p><b>Physical characteristics</b></p> With a lens filter diameter of 52 mm commonly filter size, gives you a variety of filter options. Weights 582 grams so plan ahead, carry only if really necessary. 99 mm long, requires consideration if you want to carry in the camera bag.
7Artisans 25mm f/1.8
~$129
7Artisans 25mm f/1.8 is a manual focus wide angle lens for aps-c cameras.<p><b>Optical design</b></p>Has 12 aperture blades, this lens has a beautiful bokeh. Wide open, subjects located outside the depth of field are shown very blurred. Full frame equivalent focal length is 37.5 mm.<p><b>Physical characteristics</b></p>32 mm long, this small lens should be always in the camera bag. With a lens filter diameter of 46 mm you are one step from the next standard filter size, buy step-up ring and bigger filter but you can chose from plenty options. Weights 143 grams so convinient to carry.
7Artisans 35mm f/0.95
~$203
7Artisans 35mm f/0.95 is a manual focus wide angle lens for aps-c cameras.<p><b>Optical design</b></p>Full frame equivalent focal length is 52.5 mm. Has 12 aperture blades, this lens has a beautiful bokeh. Wide open, subjects located outside the depth of field are shown very blurred.<p><b>Physical characteristics</b></p>Weights 369 grams so plan ahead, carry only if really necessary. 67 mm long, this small lens should be always in the camera bag. With a lens filter diameter of 52 mm commonly filter size, presents numerous filter possibilities.
7Artisans 35mm f/1.2
~$115
7Artisans 35mm f/1.2 is a manual focus wide angle lens for aps-c cameras.<p><b>Optical design</b></p>Has 9 aperture blades, with this amount of aperture blades you will be satisfied with the result. Wide open, subjects located outside the depth of field are shown very blurred. Full frame equivalent focal length is 52.5 mm.<p><b>Physical characteristics</b></p> With a lens filter diameter of 43 mm you are one step from the next standard filter size, buy step-up ring and bigger filter but you can chose from plenty options. Weights 150 grams so convinient to carry. 32 mm long, this small lens should be always in the camera bag.
7Artisans 35mm f/1.4
~$236
7Artisans 35mm f/1.4 is a manual focus wide angle lens for 35mm rangefinder cameras.<p><b>Optical design</b></p>Has 10 aperture blades, this lens has a beautiful bokeh. Wide open, subjects located outside the depth of field are shown very blurred.<p><b>Physical characteristics</b></p> With a lens filter diameter of 49 mm commonly filter size, offers a wide range of filter options. Weights 404 grams so plan ahead, carry only if really necessary.
7artisans 35mm f/2.0
~$200
7artisans 35mm f/2.0 is a manual focus wide angle lens for 35mm rangefinder cameras.<p><b>Optical design</b></p>Bright lens thanks to the high aperture value Has 10 aperture blades, this lens has a beautiful bokeh.<p><b>Physical characteristics</b></p>Weights 320 grams so plan ahead, carry only if really necessary. With a lens filter diameter of 43 mm you are one step from the next standard filter size, buy step-up ring and bigger filter but you can chose from plenty options. 41 mm long, this small lens should be always in the camera bag.
7Artisans 50mm f/0.95
~$173
7Artisans 50mm f/0.95 is a manual focus prime lens for aps-c cameras.<p><b>Optical design</b></p>Has 13 aperture blades, this lens has a beautiful bokeh. Wide open, subjects located outside the depth of field are shown very blurred. Full frame equivalent focal length is 75.0 mm.<p><b>Physical characteristics</b></p>Weights 420 grams so plan ahead, carry only if really necessary. 58 mm long, this small lens should be always in the camera bag. With a lens filter diameter of 62 mm you are one step from the next standard filter size, buy step-up ring and bigger filter you may want to use a step-up ring and 67 or 77mm filter.
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