Coma Corrector for f/5 Newton and DSLR

[chris_33]

i am looking for a coma corrector for astrophotography, i have a skywatcher 254/1200 pds, a nikon d5100, and a skywatcher off axis guider, what would you recommend?

[mikey2000]

I'd get in touch with your supplier (FLO, here in the UK are very good at giving advice).   For what it's worth, I have a Baader MPCC mk2 corrector.  It works very well with my 130PDS, 150PDS scopes (both F5) .    Getting the spacing exactly correct was very important but with careful 'shimming' I added a fraction of a mm to the setup and can get nice shape stars all the way to the edge of my 4/3 size sensor (slightly smaller than the D5100 sensor)

 

 

[Shibby]

I used to use Skywatcher's own coma corrector on a 150PDS and was very happy with it, even with an ASP-C sensor.

[SamAndrew]

Pretty sure there is no space for an off axis guider with a DSLR. Teleskope Express do a special one for Canon cameras but I don't know of the equivalent for Nikon.

https://www.teleskop-express.de/shop/product_info.php/language/en/info/p2722_TS-Optics-Off-Axis-Guider-for-Canon-EOS-cameras---replaces-the-T-ring.html

 

[Adam J]

I am currently testing the TS Max Field Coma corrector with a 130PDS Newtonian, a 3-element corrector. My initial impression is it has some advantages over the 2-element correctors (baader and SW) but I have only had a single session with it so have not yet got it dialed in fully. 

Adam

[dph1nm]

On my f4 quattro I use the Skywatcher Aplanatic corrector (4-element). Works great, but it is designed for the Quattros so I don't know it would fare on an F5 PDS. Note this is a different (and more expensive) beast than the basic Skywatcher 0.9x corrector.

NigelM

[Adam J]

20 minutes ago, dph1nm said:

On my f4 quattro I use the Skywatcher Aplanatic corrector (4-element). Works great, but it is designed for the Quattros so I don't know it would fare on an F5 PDS. Note this is a different (and more expensive) beast than the basic Skywatcher 0.9x corrector.

NigelM

That is a good question as to if that corrector can be used at F-ratios other than F4.