Great video. I have a lot of the older GSO 150mm scopes at various F ratios and have done very similar things to those to get the performance dialed in. I use neoprene sponge foam rubber sheets in lieu of the vinyl for my dew shields with a similar Velcro straps, which works great.
There is a solution that I think will work better but since I don't have this exact scope, I can't say if it would be better in this case. The clips typically extend much futher into the light path than is necessary. Removing the clips and feiling some of the unnecesary extension is the first thing. The second is to round the provile of the clip if they have a curved rectangle profile. If you curve the edge, it is doing much the same thing as a curved spider vane, which is more evenly distrubting the energy. Also, when you reduce the aperture of the primary, you increase the central obstruction, which lowers contrast. Masking down by 2mm is the same as making the secondary 4mm larger.
The clips are rounded with the Carbon Star but your tip should be helpful with some of the other scopes. I found the contrast to be surprisingly good for a newt. The baffling and dew shield and the things they did to control light leaks are really paying off. However, you comment about the increase to the central obstruction is duly noted. I have since worked out a solution that doesn't require the mirror mask and will be posting a video workshop soon. Thanks!💫
Found it just now on Amazon USA: www.amazon.com/Easy-Bagger-Plastic-Trash-Liner/dp/B0044UGXH6/ref=asc_df_B0044UGXH6?mcid=68a4c2638feb394cbafb85e4d143f1ed&tag=hyprod-20&linkCode=df0&hvadid=693711599665&hvpos=&hvnetw=g&hvrand=3560310453543697945&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9020641&hvtargid=pla-1771108342717&psc=1 💫
I am considering purchasing this telescope, so I found this video very helpful. What sensor sizes pair well with the focal length of this scope? Full frame? APS-C? Square crop? I have only the ASI533MC presently. Thank you!
You're all set with the ASI533MC you have. It's the one I use with the CarbonStar and found the Baader MPCC coma corrector works well with it, which costs less than any number of them. You can use an APS-C sensor, but it will be a little challenging to obtain a completely flat field. BTW: I have another workshop coming up on the Carbon Star 150 on how to optimize the primary mirror to prevent star diffraction spikes anomalies without using an aperture mask or software. Stay tune... 💫
Good idea, that would help. 👍 The thing that scares me is the screwdriver slipping off the screw and scratching the mirror. That's why I like to hold the tip between my fingers when working that close to the mirror. 💫
You knocked it out of the ballpark with this one. Bravo!
Thank you!💫
Great video. I have a lot of the older GSO 150mm scopes at various F ratios and have done very similar things to those to get the performance dialed in. I use neoprene sponge foam rubber sheets in lieu of the vinyl for my dew shields with a similar Velcro straps, which works great.
Yeah, that will work. 👍 💫
Great video!
💫
There is a solution that I think will work better but since I don't have this exact scope, I can't say if it would be better in this case. The clips typically extend much futher into the light path than is necessary. Removing the clips and feiling some of the unnecesary extension is the first thing. The second is to round the provile of the clip if they have a curved rectangle profile. If you curve the edge, it is doing much the same thing as a curved spider vane, which is more evenly distrubting the energy. Also, when you reduce the aperture of the primary, you increase the central obstruction, which lowers contrast. Masking down by 2mm is the same as making the secondary 4mm larger.
The clips are rounded with the Carbon Star but your tip should be helpful with some of the other scopes. I found the contrast to be surprisingly good for a newt. The baffling and dew shield and the things they did to control light leaks are really paying off. However, you comment about the increase to the central obstruction is duly noted. I have since worked out a solution that doesn't require the mirror mask and will be posting a video workshop soon. Thanks!💫
Loving the idea for the dew shields....but wondering where to get this stuff in the UK...maybe Amazon. Thanks for the video as always.
Found it just now on Amazon USA: www.amazon.com/Easy-Bagger-Plastic-Trash-Liner/dp/B0044UGXH6/ref=asc_df_B0044UGXH6?mcid=68a4c2638feb394cbafb85e4d143f1ed&tag=hyprod-20&linkCode=df0&hvadid=693711599665&hvpos=&hvnetw=g&hvrand=3560310453543697945&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9020641&hvtargid=pla-1771108342717&psc=1 💫
I am considering purchasing this telescope, so I found this video very helpful. What sensor sizes pair well with the focal length of this scope? Full frame? APS-C? Square crop? I have only the ASI533MC presently. Thank you!
You're all set with the ASI533MC you have. It's the one I use with the CarbonStar and found the Baader MPCC coma corrector works well with it, which costs less than any number of them. You can use an APS-C sensor, but it will be a little challenging to obtain a completely flat field. BTW: I have another workshop coming up on the Carbon Star 150 on how to optimize the primary mirror to prevent star diffraction spikes anomalies without using an aperture mask or software. Stay tune... 💫
It would be easier if you magnetized your screwdriver that way you wouldn’t have to worry about them falling on the mirror.
Good idea, that would help. 👍 The thing that scares me is the screwdriver slipping off the screw and scratching the mirror. That's why I like to hold the tip between my fingers when working that close to the mirror. 💫