BetterPhoto Q&A
Category: Film-Based Camera Equipment

BetterPhoto Member		usage COSINA cs1 Hello, I am having cosina c1s camera with 35-70mm zoom. 1. I am looking for high zoom which lens to select. 2. What does Macro 1.5X written on lens mean. 3. Is Vivitar 3200A flash OK.. 4. give me some good tips on photography like Nature, fashion .. BR Harry To love this question, log in above March 29, 2004

Jon Close		1. I believe the Cosina C1s uses the common Pentax K-mount. Any Pentax lens and any other maker's lens made for the Pentax K-mount will work on it. You'll be happier using older manual focus lenses than using autofocus lenses in manual focus mode. http://www.bdimitrov.de/kmp/ is a good source of information on the better old manual focus Pentax lenses if you're shopping for used. Choices for new manual focus lenses are a bit limited. Try Pentax smc P-A Zoom 80-200mm F4.7-5.6, or Tokina 60-300 f/4-5.6 (model SZ-X 630). I think Cosina also makes manual focus lenses for this mount. 2. "Macro 1.5X" is written on what lens? The 35-70 you have or another you are looking at? If it's on the 35-70, I'm pretty sure it refers to the close focus ability of the lens, and is probably 1:5x (0.20 life size at closest focus distance) rather than 1.5x. If it's on another lens, I'm guessing it's a teleconverter that increases the lens focal length by a factor of 1.5x. This works as an alternative to a true macro lens as the lens/teleconverter combination gives greater magnification than the lens alone because it still focuses as close as the lens alone. A teleconverter also has the effect of reducing the maximum aperture by the same factor, so used with a f/3.5-5.6 zoom the combined lens/teleconverter maximum aperture would be f/5.25-8.4. 3. The Vivitar 3200A is ok and can be used with this camera. To love this comment, log in above March 29, 2004

Matej Hochel		Hi there! I also used to have Cosina c1s. (have switched to Pentax MY-6 a year ago) Jon is right - Cosina has the Pentax K-mount, so you can use any of the Pentax MF or even AF lenses. Besides it, Cosina also makes its own MF lenses for k-mount. I still posses Cosina 70-210 MF. It is ok and can work even with my new Pentax camera. As far to the older lenses - Tokina SZ-X is a really good choice. However I had a really hard time finding - no way. That is why I finally got the original Cosina 70-210. Good luck! To love this comment, log in above April 13, 2004

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