Most helpful for a beginner . I ordered the scope and the reducer flattener as a package. It still won't focus with a DSLR. I now know why. Many thanks
Hi Andy, I have a GSO corrector Coma and his backfocus is 75mm. I use with sv405cc and some extension rings. But I don't know how much I need put the correct coma with extension rings inside the focuser, is there some rule?
I agree with everything you said Andy, it can be a PITA to get right. You mentioned making the scope faster, but what are the benefits of a faster scope?
The main benefits are gathering the same amount of light in a shorter period of time. This can help reduce exposure times. Also the wider field of view is great for framing larger subjects. Hope this helps.
@@AndyofAstro Thanks, what would be helpful is a practical demonstration of what a faster scope image looks like v a scope without a reducer, im in two minds right now about buying a reducer.
@@tomreid7 that's a good idea for a video. Basically I use the 0.8x for nebula because (often but not all the time) they are quite big and very dim. Therefore the 0.8x brings the light in faster and help fit the object in the FOV. For small galaxies ((M51 for example) I use the 1x as I need the magnification to make them bigger and then use a longer exposure time to capture them. For Andromeda M31 the reducer is essential to fit the galaxy in the frame with the 0.8x reducer even then the image is at an angle to fit. I was very lucky as I picked my ones up second hand after some hunting.
@@AndyofAstro , I was thinking the same, make a video demonstrating the benefits, as no one has done this so far, there's plenty of advice on YT, and thats great, but just telling folk to buy a reducer is not enough for me, lol. I was led to believe that you had to buy rhe manufacturers reducer for whatever scope you have, is that the case in your experience?
@@tomreid7 If they are the same brand, I would like to think that the optics are matched for the telescope. Again there are always exceptions and my coma corrector is Baader not Skywatcher. The only way is to get the manufacturers/suppliers advice to see what is compatible.
Most helpful for a beginner . I ordered the scope and the reducer flattener as a package. It still won't focus with a DSLR. I now know why. Many thanks
Thank you Andy. I am a newbie and now know much better how to deal with back spacing.
A very useful explanation. Thank you Andy!
Hi Andy, I have a GSO corrector Coma and his backfocus is 75mm. I use with sv405cc and some extension rings. But I don't know how much I need put the correct coma with extension rings inside the focuser, is there some rule?
Nice explanation. Very helpful.
Thanks
Speed at the cost of resolution
I agree with everything you said Andy, it can be a PITA to get right.
You mentioned making the scope faster, but what are the benefits of a faster scope?
The main benefits are gathering the same amount of light in a shorter period of time. This can help reduce exposure times. Also the wider field of view is great for framing larger subjects. Hope this helps.
@@AndyofAstro Thanks, what would be helpful is a practical demonstration of what a faster scope image looks like v a scope without a reducer, im in two minds right now about buying a reducer.
@@tomreid7 that's a good idea for a video. Basically I use the 0.8x for nebula because (often but not all the time) they are quite big and very dim. Therefore the 0.8x brings the light in faster and help fit the object in the FOV. For small galaxies ((M51 for example) I use the 1x as I need the magnification to make them bigger and then use a longer exposure time to capture them. For Andromeda M31 the reducer is essential to fit the galaxy in the frame with the 0.8x reducer even then the image is at an angle to fit. I was very lucky as I picked my ones up second hand after some hunting.
@@AndyofAstro , I was thinking the same, make a video demonstrating the benefits, as no one has done this so far, there's plenty of advice on YT, and thats great, but just telling folk to buy a reducer is not enough for me, lol. I was led to believe that you had to buy rhe manufacturers reducer for whatever scope you have, is that the case in your experience?
@@tomreid7 If they are the same brand, I would like to think that the optics are matched for the telescope. Again there are always exceptions and my coma corrector is Baader not Skywatcher. The only way is to get the manufacturers/suppliers advice to see what is compatible.