• Welcome to Orpington Astronomical Society.
 

News:

New version SMF 2.1.4 installed. You may need to clear cookies and login again...

Main Menu

Another Pimp my scope.

Started by Mac, Feb 15, 2010, 17:27:46

Previous topic - Next topic

0 Members and 3 Guests are viewing this topic.

Mac

You must be kidding mr G. :o

Its only a 200mm :D

This is more like it.
http://www.amazon.co.uk/Nikon-400mm-2-8G-AF-S-Nikkor/dp/B000VDF5JC/ref=sr_1_2?ie=UTF8&s=electronics&qid=1266332381&sr=8-2

or even this one 600mm f4
http://www.amazon.co.uk/Nikon-AF-S-600mm-IF-ED-warranty/dp/B00319IWLQ/ref=sr_1_2?ie=UTF8&s=electronics&qid=1266332466&sr=1-2-spell

They did make these lenses, but they are a tad slow / Heavy / LONG.
http://www.mir.com.my/rb/photography/companies/nikon/nikkoresources/zoomsMF/12001700mm.htm

With my f3.3 I can get the scope to be 770mm @ F3.3

With just a small amount of spherical aberration.

MarkS

Quote from: Mac
With my f3.3 I can get the scope to be 770mm @ F3.3
With just a small amount of spherical aberration.

Hmm...  I tried that - F3.3 with my C11.

Trouble is, it doesn't really cover the full frame of a Canon or Nikon DSLR does it.

Mac

QuoteTrouble is, it doesn't really cover the full frame of a Canon or Nikon DSLR does it.

Couldn't really tell as i've only used it with the H9.
and to tell you the truth i wasnt impressed.
However saying that, I'm not too sure how much of that was down to the fact the collimation is still very bad.
and /or the focal reduction aberation.

Cant wait to try it through the D3, I can still change the CCD size from

FX format (36 x 24): 4,256 x 2,832
5:4 (30 x 24): 3,552 x 2,832
DX format (24 x 16): 2,784 x 1,848

so that might get round the vignetting ect.

Might have to borrow your artifical star, unless i can get round to building one before the weekend.
Now where's my powersupply and LED. :-?

Mac.

MarkS

Quote from: Mac
Might have to borrow your artifical star


I always bring it to DSC but you're welcome to PM me and pick it up in advance.

I never managed to get good results with the F3.3 reducer.