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Archive 2013 · Opinions on changes of my line of telephotos?
  
 
SunBlack
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p.1 #1 · Opinions on changes of my line of telephotos?


I have a Canon 5D mkIII. I have a Nikon 300/2.8 AFS II and a Nikon 180/2.8 . Use: astronomy. I use the 180mm medium star fields, and the 300m for tiny galaxies too (where it is very important to the resolving power of the lens to center field and in this case stop to f3.5 or f4).
I would sell both and buy one of:
Canon 200/1.8 used + 1.4x used (that would be multiplied f2.5 w.o., and I would use it to f3.5 or f4 as said above)
Nikon 200/2 VR used + 1.4x used (that would be multiplied f2.5 w.o., and I would use it to f3.5 or f4 as said above)

I give up (since the use of the TC I would lose too much, even if stop to f3.5 or f4) or would it be a viable solution? better Canon or Nikon?



May 08, 2013 at 04:32 PM
BenV
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p.1 #2 · Opinions on changes of my line of telephotos?


Fred uses the Canon 500 and gets spectacular results. Check the Astrotrack thread, lots of great setups posted in there


May 08, 2013 at 04:52 PM
SunBlack
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p.1 #3 · Opinions on changes of my line of telephotos?


i have an equatorial mount. 500mm too long i would remain into 300mm realm.


May 08, 2013 at 05:03 PM
 

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BenV
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p.1 #4 · Opinions on changes of my line of telephotos?


SunBlack wrote:
i have an equatorial mount. 500mm too long i would remain into 300mm realm.


Depends on how stable your mount is, the astrotrak is phenomenal and the 300 is too short for a lot of things



May 08, 2013 at 05:14 PM
BenV
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p.1 #5 · Opinions on changes of my line of telephotos?


http://www.fredmiranda.com/forum/topic/1192050

this is the thread I was referring too, enjoy!



May 08, 2013 at 05:15 PM
SunBlack
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p.1 #6 · Opinions on changes of my line of telephotos?


I have a medium capacity load mount, vixen gp-dx.


May 08, 2013 at 06:26 PM





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