don't you just hate it when....

[[1ponders] (Paul)]

Are you using a tele-extender for your EEP shots? These shots were taken using a 102mm celestron refractor and a meade tele-extender, 20mm lense and a canon 300d http://www.iceinspace.com/forum/show...t=conjunction.

If you're using one I have an excel spreadsheet I made up That calculates focal lengths, multiples of magnification, f ratios etc, simply by putting in your OTA focal length, your various eyepiece focal lengths and the distances from imaging chip to last lens element (which is easy enough to work out once you know how). I've found it very handy for working out exposure rates with still cameras when used in conjunction with Michael Covingtons "Astrophotography for the Amateur" or other exposure rate charts.

[rowena]

Ive actually ditched using my teleextender, purely for the fact that when i look through the lens without it on, the images seem more sharp.

its like putting a tele-extender lens on a 300mm zoom camera lens, you get a bit of distortation even though your doubling the magnification.

hrm i think i'll have to try the teleextender, and perhaps my 17mm lens. i'll also try the tripod trick aswell. I'll see how i go tonite.

I just dont won't to put too much weight on the back of my scope! i just don't want a $1700 worth of equipment falling to the ground!
I have this fear it will come lose one day and go *smash*

anyhow this is my url with the photos i took with different exposure times/iso's of image no.2 (didnt get a chance to do all of them!)
please note there are 9 images per page, around 100K each image. 2 pages worth.

http://photos.zethos.org/jupiter120305

rowena