... 3.5" or 90mm. I have an Orion ST-80 in my hand along with a ruler (good to 1/16 inch). The main body measures 3 9/16. The Dew Shield measures 3 15/16. Any...
Hi Folks, I just uploaded an image from last night's lunar eclipse. I was only able to catch the last part of the eclipse due to clouds at moonrise. Image was...
Our club ASNH assembled at Southern Connecticut State University for a public viewing of the Lunar Eclipse. In spite of 4 Weather Reports predicting gloom we...
Well, the anticipated Orion Mini-EQ arrived today. Unfortunately, 1 ear of the telescope mount was broken off. So, it is on the way back and another is being...
William Optics sells an 80mm Apo upgrade. It's expensive for a replacement, but it makes your scope an Apo. From what I understand it has a longer focal length...
Before I considered something like this, I'd just consider a William Optics 66SD, which is likely to be a more practical upgrade. Yes, with the 66 you give up...
I assembled a Scope with this Surplusshed lens more than 2 years ago and it is my first scope. I prefer this scope instead of using binoculars. I made a few...
I agree with Rod. I rarely use my white Orion St80 since getting my SD66. It is an all round better scope. I had considered doing the Apo upgrade to my own...
Rick; I believe the WO upgrade is for the 80mm F6 achromats such as the WO and Orion black finished 80mm scopes with Crayford focusers or the SV Nighthawk, not...
Rich, You are correct. I took a look at the surplus shed offerings It looks like the way to go. S. Buki, By the way, what happened to your original lens? I ...
Paulo; The field curvature seems to be a common problem with virtually all doublet or triplet refractor astronomical telescopes. Typically the radius of...
Rich Many thanks for your comments. They're valid also for APO's/ED's? I've never watched thru an APO, but I had the idea that such an expensive refractor...
Paulo; Field curvature remains about the same for most doublets and triplets of a given focal length, achromat or APO. TV offers field flatteners which specify...
I finally got the Orion Min-EQ. It is a pretty cool little mount. I see what is meant by needing a little more clearance at times. I also bought an Orion...
... The Jr. Gearhead isn't a bad choice for an alt-az mount, but if you plan to use one, I recommend mounting your scope with the the attitude axis... notice I...
Jim, I'm Larry. I followed up Whitney's comment recommending a Jr. Gearhead with my inherited bit of wisdom about turning the Jr. Gearhead attitude axis 90...
Hi Larry - I realized that was your post after I had already replied to it. I ordered a Microstar Deluxe (used) for my 3021 tripod and was wondering what to do...
It seems that when I bought my Skywatcher 80st, I had received the "terrestrial" OTA and not the "astronomical" OTA. The "terrestrial" OTA being the one that...
Hey there. I replaced the stock focuser with a two speed crayford manufactured by Antares. Definitely an improvement. Easy to install. I will try to upload...
Very slight vignetting (and I mean SLIGHT) using my Orion Q70 2" eyepieces (26mm, 32mm and 38mm). I really prefer to use my 1.25" Radians, which have a 60...
I'd like to replace my Orion Short Tube 80 1.25" visual back, which has a set screw, with a 1.25" back with compression ring. I know Mercury Systems and...
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