bomberbaz

what he said

its a waste of glass if you ask me

Yes I think I am gathering this by some pretty fast reading. Maybe I should do this before posting, thanks.

This is a very interesting thread if I can interject a little. Stu you said : Does this mean that CA in a std achromat frac will be reduced. If this is the case would it work with or without binoviewers. Excuse my naivety but I have not come across a GPC before, are these a recent thing? EDIT> Think I am missing something here, are these a Newt thing.

There are so many different permutations I think there will be a lot of trial and error going on here. I have a few ideas of my own but when you start adding binos and barlows etc it starts to get complicated.

I have brought this up a few times before in other threads. I have pretty bad astigmatism but find that I can use eyepieces that give a exit pupil of 3mm or less without my glasses. you may find it different but I think it could be worthwhile for you to try and see if you find it the same. It will lead you to a different world, especially at high power viewing. Well that's my own findings.

It never twigged to me the extra distance barlowing the bino's would increase the magnification ratio. Good point and thanks, Always learning. Glad I got a 2x tele-extender. Although still have a 2x barlow. Steve

actually scratch my last comment. I found It fits into this spotting scope https://www.firstlightoptics.com/offers/hubble-cassegrain-reflector-telescope.html

Up until recently my purchasing had stopped, "until recently" being the key words. Now I am actually at the end of my latest spending spree and I am actually shedding a few bits, mainly eyepieces. However I will to soon be adding to this thread once I take possession of my new truss. Watch this space. Steve

It's gotta be a mikey take. Even at F15 you have an exit pupil of near 7mm. In an F5 you would have 20mm exit pupil. Come on folks, it's a wind up.

It is going to remain in a northerly position slowly tracking westward then disappearing out of view as it heads out of the solar system. If you have a poor northern aspect you are going to need to travel out to get a decent view.

Question I would be asking first is what caused it. I think I would leave it for now, and if you can put it partially back together so you can see the cogs as it turns then carefully turn and watch for the offending gears above engaging. Is that possible? which mount is it btw. I find in situations like this where cause of issue is unclear a series of careful testing and checking and re-testing as required is the best way.

HOW MUCH !!!! Just looked on APM website, are they layered in Gold 🙀

The Pierro Astro one isn't exacvtly cheap either

Just done another look for you based upon chelmsford as the point of viewing. It is rising quickly over the next week and by the 22nd it will be flying through the legs of ursa major at a height of circa 22 degrees. All based upon 11am time. However it will also have faded by this point from its current mag 2.7 to mag 4. It will fade quickly by the looks. Info take from stellarium btw, I cannot confirm accuracy of the info.

You need to look N by NW at around 15 degrees from the horizon. You should be able to pick it up from around 11 pm and the comet as you may well know is appearing to be travelling downwards. It is currently naked eye but best in bins or maybe a fast frac at low magnification and is currently fading as it travels away from the earth.

I recently measured mine with the pinprick card test and got mine to around 6.3. So hard to measure when you are using homemade devices with only a ruler to measure and magnifying glass the distances though.

Yeah sorry Baz I shoulda said take the picture through cheshire, my bad.

Sorry that takes me into overgeek. If I need technical help in future I shall ask one of you instead 😉

^^ based upon that post above you get the following: 24 (X34) - 14 (X58) - 9 (X90) - 7(X115) - 5.6 (X144) - 3.5 (X230) the 24 has a fov of 65 giving a very nice 2 degrees in your scope. PS> You could argue there is space for a 4.5 though. (delos territory)

You have a lovely powermate that will reduce your 14mm to 5.6, that's one gap filled. Then another 7mm Pentax XW to fill the gap between 9-5 and your sorted. Now you can get an APM 24mm UFF with money saved from not needing a 5, It's a great eyepiece, 1.25 barrel too.

Ah but you live in texas Louis, not in the UK where in my town there are many air pollutants at not that great a distance from my home. Basically our population density is quite high and thus air polution will naturally be higher. Hence my statement. Cheers Steve

I have a double atlas which I haven't actually had chance to use due mainly to the weather. However it is my intention to work through it constellation by constellation with my first weapon of choice being a 4" frac. Any that cannot be resolved will be hit with a light bucket, ie; large dob.

Post up a picture taken through the focuser tube, let us have a look. A 2nd eye looking things over may see thing your maybe over looking. Just a suggestion.

wowser just been looking up the TEC140 and quickly came away from the website. I have spent enough this last 6 months. Personally I would say that is the type of scope that I would prefer to be mounted on a pier