Connor brad

54 minutes ago, Louis D said:

I use the GSO/Revelation coma corrector with a 25mm spacer between the optics section and the eyepiece holder.  As long as all your eyepiece focus within about 5mm of the eyepiece shoulder, I've not found a need to tune the distance for each eyepiece.  For me, eliminating 95% of the coma is good enough.  It does require about 11mm of in focus, so it is similar to the Paracorr II.

The ES HR corrector requires about 35mm of in focus, so not all scopes are able to achieve focus with it.  Most reviews of it are positive aside from the very find threads to tune correction.

Should the explore scientific coma corrector work in my scope? 

Hi I have a 8 inch f5 skywatcher explorer with a dual speed focuser I'm looking to buy a coma corrector but not the paracorr as that's way past me budget there's no way I'm paying that much money what's the second best coma corrector after the paracorr  that is a bit cheaper? although I got a 27mm panoptics, 18mm celestron xcel and 12mm bst starguider since I have a televue eyepiece is it only the paracorr that works on televue eyepieces or can I use any coma corrector with it? 

I'm looking into buying the skywatcher coma corrector as I dont have the budget to buy a top end coma corrector at the moment I have a skywatcher explorer 200pds Newtonian is the skywatcher coma corrector any good and does the spacing need changed with different eyepieces I use me 27mm panoptics most is this recommended coma corrector for visual use on f5?. 

Hi would the televue type 2 paracorr work on me 200pds skywatcher explorer and 150p skywatcher explorer f5 scopes? 

Hi I have a skywatcher explorer 200p f5 what's the best coma corrector that would work well on my scope is it worth buying a paracorr? 

1 minute ago, toshapetriji said:

They are both very fine eyepieces the differences are likely to be dependant on the individual.

I hear the Panoptics are better than the explore Scientific in performance and edge of field sharpness 

Hi what is better eyepiece in performance and better edge of field star sharpness out of televue Panoptics or 68 explore Scientific? What is a better choice? 

Would the 27mm panoptics work well on a 200pds skywatcher explorer? 

I hear the celestron xcel lx is good choice 

I'm astigmatic person 

Would the 27mm be a bit better 

Would the 24mm Panoptic work well on a 200pds skywatcher explorer? 

On 25/08/2020 at 18:55, John said:

Low cost eyepieces used with scopes of F7, F/6, F/5 etc often do show astigmatism in the outer parts of the view.

It looks sort of like this:

Stars look more like pins of light through the Barlow 

Just now, Connor brad said:

 

These are the shapes I see 

I sometimes see like a red fringe around them aswell 

On 25/08/2020 at 18:55, John said:

Low cost eyepieces used with scopes of F7, F/6, F/5 etc often do show astigmatism in the outer parts of the view.

It looks sort of like this:

These are the shapes I see 

On 25/08/2020 at 18:45, Louis D said:

When star testing, astigmatism of the eyepiece will appear as a tangential line on one side of best focus and a radial line on the other side.  At best focus, it will look like an enlarged star with the possibility of small spikes in both directions.

You may also be dealing with field curvature.  Focus on a star in the center and then move it to the edge.  Does the tightness of the star image improve by refocusing?  If so, you've got field curvature in either or both the telescope and eyepiece.

Without a coma corrector, you could also be seeing coma from the mirror near the edge, though it isn't commonly seen in the narrow field of view eyepieces commonly packaged with telescopes.  Generally, the eyepieces have enough aberrations of their own to overwhelm any mirror coma.

What eyepieces came packaged with the scope?  Are you wearing your new eyeglasses at the scope?  To eliminate it being eye astigmatism, rotate your whole head around the eyepiece to see if the aberrations rotate with your eye.  If they don't, they're in the eyepiece.  If they do rotate, they're in your eye.

The super 25 and super 10 eyepieces and I do wear glasses when viewing but I still see these Abberations 

On 25/08/2020 at 18:55, John said:

Low cost eyepieces used with scopes of F7, F/6, F/5 etc often do show astigmatism in the outer parts of the view.

It looks sort of like this:

Yes it looks similar to that the eyepieces I use is super 25 and super 10 the eyepieces that came with the scope 

Hi could this be caused by the quality of the eyepieces aswell and I may need to buy a better eyepieces? 

Hi, anyone who is experienced and knows about eyepieces when I look at stars through me telescope they look like elongated diamond shapes or seagull shapes I use the eyepieces that came with me scope I have a 200p skywatcher explorer anyway even in the centre they look elongated and I also see color fringing around them I got tested for astigmatism I got given glasses but I still see these elongated stars and color fringing me mam also see these Abberations could anyone tell me what could be causing this? 

Thanks 

Hi, I have a 200p skywatcher explorer I was seeing astigmatism when looking through the eyepiece I got tested and they found astigmatism in my eyes anyways they provided me glasses but I'm still seeing the same distortion sometimes the stars look like a deformed diamond or a elongated kite a bit like the umbro symbol at the egdes they look a bit like seagulls anyone know what it could be could be because I have cheap eyepieces I use the eyepieces that came with the scope or could it be a collimation problem?