Re: [APML] wide-field images

[Maurice Toet <mftoet@amateur-sterrenkunde.nl>]

Bert Katzung wrote:
 
> Hi Maurice:
> I don't have one of those fancy LCD displays either, but your images look
> very nice indeed on my 19 inch CRT monitor. Vignetting, though present,
> seems pretty tolerable---much better than my Pentax shots wide open. Were
> the E200 transparencies very dense after 26 min at f 5.6?  How many stops
> closed down is 5.6 on your lens?
> Bert

Bert, thank you for your comments. I happen to be very pleased with my
two Mamiya lenses, as they perform very well. Both lenses were closed
one stop down when making the exposures. So the 210 mm is a f/4 and the
80 mm a f/2.8. I think the exposure time of 26 minutes with the 80-mm
lens at f/4 is exactly right. There's no cast to the green on the slide.
The other shot could have used some more exposure time. Although the
conditions just above the horizon weren't ideal. I think an exposure of
an hour is possible with the 210-mm lens at f/5.6 if it's pointed to the
zenit. I believe that's very dependant on the humidity of the air. 


Kind regards,

-- 
Maurice Toet 
http://www.amateur-sterrenkunde.nl

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