Quote:
Originally Posted by Jasp05
Got a few more questions regarding the viability of the Sky adventurer mount.
At this stage from what I've seen, the HEQ5 mount is a bit out of budget right now.
What kind of Focal lengths would I need to capture some decent details in some of the brighter nebulae's (Lagoon, triffid, M42, Eagle etc).
I've currently got a 200mm lens on an APS-C Sensor (So effectively 300mm approx).
How big a lens (or FL) can the sky adventurer handle whilst maintaining tracking accuracy?
And is the autoguide feature on the sky adventurer actually worthwhile using given it has no tracking in declination? (It only adjusts in RA).
If i could get 3-5 min subs using guiding with a 200mm lens I think that would allow me to image many objects to keep me occupied for a long while.
But I want to be sure that this is a reasonable expectation of the sky adventurer mount. (I've read some people can do 1-2min at 200mm (unguided I believe) while others are getting 4min subs with perfectly acceptable results. see below.
http://www.opticalvision.co.uk/user/..._review_hq.pdf |
Hey mate,
I am/was in the same boat, couldn't afford a proper EQ mount, also I'm flying down from Cairns to Surfer's for a month to visit my daughter so portability was a consideration too.
I've just started using my Star Adventurer, with a Nikon D600 so full frame and a 200mm I'm getting 2 min subs and I'm using a QHYCCD Polemaster for polar alignment.
I have been trying to use longer FL of 360mm (180mm + 2X TC) but was only getting 1 minute subs with that and wasn't picking up the nebulosity - not sure though if this was because the exposures weren't long enough or because of light pollution or more likely both.
I was using that lens with the camera on a ball head on the L-bracket with counterweight but am now not using the BH as was advised that it makes tracking less accurate.
Andy