Deep Space Explorer 10” f/4.5
Bortle 8/9, Norfolk VA
I purchased this telescope from a club member. The secondary was extremely out of adjustment, so much so the previous owner thought it needed to be replaced. The actual issue was the adjustment screws and plate have been run out to their full length. After removing the secondary and resetting the adjustment screws and plate I was able to coliminate it with out issue. Focuser was broken when I purchased it. I replaced it with a used single speed 2” Crayford.
- Note for other beginners, none of this was terribly hard it just required caution and patience.
- All comparisons are too my Zhumell Z130.
- Used GPS compass on phone and inclinometer to push to.
1930: placed scope outside to get to correct outside temperature.
Saturn and Jupiter – very low ~ 15 – 20 degrees.
Saturn -Lots of shimmering. Bad seeing. Cassini division shimmers in and out. That never happened with z130 at this alt. Banding on planet easily visible. On z130 this requires great seeing ( IME so far )
Jupiter – bands extremely visible and show more detail. Can see more than just the 2 main ones. Can see more than Galilean moons maybe 4 or 5 more. Still shimmering
Using log magnification 32mm meade 4000 (38x) found M13 almost directly overhead. Even thought FOV is narrower it was much easier to find than on z130. Its much brighter and its unique fuzzy look more obvious. Tried various combinations of eyepieces.
- 32mm – small fuzzy dot looks like comet.
- 25mm K with and without barlow ( ~40x and 80x ) – fuzzy comet lookinging thing
- 6.5mm Meade HD-60 – WOW!!! Looks like diamond dust. Everything sparkles. Absolutely beautiful. Followed for 30 – 40 minutes. Stunning view. I can see what looks like “arms”. Notes say looks like
Attempt to see nearby IC 5115 failed too dim.
1131 – Found M15 using phone compass and inclinometer,.
All magnifications same. Looks like bit of fuzzy cotton. Unable to resolve any stars. 32mm Framed by trio of stars. Lower left one ( in eyepiece so opposite in reality ) is brown. I think the 10 allowed me to see the fuzziness better and spot these DSO’s at low magnification. Everything is brighter obviously.
25mm with 2x barlow. Can see 2 extremely faint stars inside triangle of stars. Triangle is 2 mag 6 stars and one mag 5 so these very faint ones are less than that. Very hard to make them out but they are there.
Looks most like cotton with 6.5mm
0000 – Jupiter just came out from behind tree. Around 30 degreess in sky. Very steady seeing here. Easily see great red spot!! Looks very much like pictures. IN z130 with steading seeing at 200x it would be dim and a little washed out but could see some details. Comparatively though it blows it away. Can see many many details in bands and patterns. GRS is salmon as everyone reports. Bands are browns and grey/blue. Can see some whirls. Suspect I could use more magnification on this but no suitable eyepiece. Couldn’t get enough travel in focuser for 1.5 barlow on 6.5mm. Stunning!!
0030 Saturn – one band very visible. Cassini division steady and obvious. Stunning.
Mars – no detail too low just looks like Venus a bit. Can see a phase.
Overall - WOW!
Compared to my z130 this thing dirty mirror and all just blows it away. I still love my z130 and will use it often. Lugging the 10” around is very doable but for nights where I just want to spend an hour I’d prefer the z130. Also for travel the z130 is easy. Can’t wait to take the 10” to a darker site. I suspect I could resolve M13 more.
Also Open clusters are really disappointing in the 10”. The FOV is too narrow to really appreciate them. Maybe a 2” eyepiece would help.
Edited by JustAnotherScott, 03 August 2020 - 08:58 AM.