- Joined
- Jul 16, 2015
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Have you tried a stone bag to stabilize? They only cost 10.00 and they help a lot.Very nice! I’ve also recently stepped in to the DSO Astrophotography waters. So far I’ve only made a couple attempts with my 70-200 lens (also using a skyguider) but have a WO Z61 arriving tomorrow!
Here’s my (heavily cropped) attempt at Bode’s and Cigar @200mm (also pretty short on exposure time as the clouds didn’t cooperate):
View attachment 191349
Nice! That'll be a nice scope! I am thinking of getting a small guide scope and camera to add to this rig when more funds become available... I have a Celestron 8" SCT that I would love to set up again soon and get a better image of both galaxies.
How much does your 200-500 weigh? You’ll be able to balance that and a guide scope on the SGP or do you plan to use something different? I’m assuming the (relatively) short subs are due to a 500mm focal length with no guiding? How far have you pushed lens with no guiding? Inquiring minds want to know. Lol
I'm not sure on the weight, but it's a few pounds. ...
When balanced well, I have seen 1.5 to 2 min exposures at 500mm come out with no star trails, but I think that's about the limit. At 52 seconds, I still lost about 25% of my subs upon close inspection because even the tiniest bobble from wind, the ground moving from stepping too close to the tripod leg, etc. will cause the frame to be unusable. If I used a more robust tripod, it would help, but I like the light portability of a standard photographic tripod.
Hope that answers your questions!
Link to an example (tho they have on adorama, ebay, amazon, and other sites as well):
Vanguard SB-100 Stone Bag