[OM] Re: Yashica 1000mm lens

[Chuck Norcutt]

I checked the old Modern Photo tests of mirror lenses and there's no 
Yashica of any focal length and the only 1000mm tested was a Meade.  But 
Yashica generally made good stuff so I wouldn't be too concerned about 
purchasing it if it's in good condition and you get a good price.

But some other thoughts.  There's a reason why you only see Meade listed 
in the 1000mm range.  At 1000mm you are basically in telescope 
territory.  Given the narrower angle of view of the e-camera it will be 
more like using a 2000mm lens on a 35mm camera.  Been there, done that 
with my 2000mm Celestron 8.  When you get that long and with that narrow 
a field of view it is extremely important to have
1) a massive tripod and sturdy head     
2) a wider field finder to be able to locate your viewing target.

If you're intent on 1000mm or above I think I'd skip the "lens" 
designation and go straight to a true telescope which is designed to 
resolve points 1) and 2) above.  Meade and Celestron are the principal 
and low cost purveyors of same.

Chuck Norcutt

Maarten Schulte wrote:
> Hi,
> 
> I looking at a Yashica 1000mm mirror lens with M42 mount.
> To be used in combination with my e-camera.
> Is there anyone who has experience with his lens?
> 
> Thanks in advance
> 
> Maarten
> 
> 
> 
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