Originally posted by Vormulac Hi there,
I have been experimenting as you say and I think I'm slowly getting a handle on it. Took some reasonable shots of the moon from hand-held and got some spot on pics of my little boys playing. I think I might get on with cat lenses after all
Looked at your Flickr thread, all fabulous, but that one with the reflection in the rider's visor - stunning!
For Moon shots there is no way to obtain good results without using a sturdy tripod and very short expsoure times with mirror prefire and remote control. Even if you go to 1/500s you will blurr a handheld image with such a lens. The tiny size and low weight is deceiving! After all the focal length is 500mm and with a refracting lens of say f/4.5 (the old Pentax 500 for instance) you would not even think to use it handheld. So don't do it with a lens, that is smaller, but quite as demanding.
For focusing: just take your time. It is easier, when the lens rests firmly on a tripod, handheld it is very hard. Take the advice for using a matching (aka long) lens hood seriously. Catadioptric lens, due to their construction, are very prone to flaring, which gives a severe loss of contrast. Nevertheless, if handles properly, they can produce very good results. If you search the forum, you will some recent discussion threads on the topic, by the way.
Ben