Hi Dave, On Wed, 8 Oct 2003 08:00:44 US/Eastern, [EMAIL PROTECTED] wrote:
> I really should be embarrassed to ask this,but i'm over 50 and > i can claim the "senior moment" disorder now.lol That's OK. I've been having them since I was a senior in high school. :-) > I put the K-M42 adaptor on the K1000, a 2x converter and used an M42, > 200 f 4 tak.The spot meter suggested 125 at just under f 8. What film speed were you using? For the moon, use 1/filmASA at f/11 for the center of your bracket (the "Moony 11" rule). > Does the 2x make the lens a 400 from a 200 AND the f stop from > f4 to f 8???? 2X T/C doubles both focal length and f-stop ... it became a 400/8. The doubler causes only the center 1/4th of the lens' image to be projected onto the film. That means you "lose" two stops of light. A 1.4X T/C only costs you one stop of light. > If the later is the case should i have left the lens at f4, set > the switch to auto and it would have been at f8 for the picture.?? That sounds right. TTYL, DougF KG4LMZ
