Ba'ader Coma Corrector MPCC

toryglen-boy (Duncan) · #1 19-01-2009, 04:28 PM

howdy

I have an 8" F4 scope ,and while its quite small and compact, it does suffer from a bit of coma, i looked at the Televu Paracorr but this was loads of money, and it would have been cheaper to get a new OTA

Then i noticed the Baader corrector at $249-$299, has anyone used one? got any comments on it? they seem quite good, how does it work, does it find inside the focusser, or screw onto the end of the eyepiece?

many thanks

erick (Eric) · #2 19-01-2009, 04:40 PM

I've had the same thought previously, but have forgotten about it recently.

I've observed that most people speaking of MPCCs on this site are using them for astrophotography.

But there are visual and photographic uses. Have you read?:-

http://www.myastroshop.com.au/produc...cc-options.pdf

Here is a thread:-

http://www.iceinspace.com.au/forum/s...ad.php?t=32205

Some more:-

http://www.iceinspace.com.au/forum/s...ad.php?t=30943

and this one:-

http://www.iceinspace.com.au/forum/s...ad.php?t=18728

gbeal · #3 19-01-2009, 05:16 PM

Tory,
I have one, and it gets used for correcting while imaging, with a range of scope, both reflector and refractor, a great piece of kit.
Visually? I have tried it, but not overly.
If your prime aim is visual then read this: http://www.alpineastro.com/optical_a...pcc_visual.htm
Gary

keppar (Graham) · #4 19-01-2009, 08:04 PM

Hi All
Will I benefit/need a coma corrector for a schmidt cassegrain

toryglen-boy (Duncan) · #5 19-01-2009, 10:22 PM

Quote:

Originally Posted by keppar

Hi All
Will I benefit/need a coma corrector for a schmidt cassegrain

doubtfull !

i would have thought the folded focal length of a SC, will be quite long enough regardless.

RobF (Rob) · #6 19-01-2009, 10:51 PM

Not sure if your interest is visual, but I've been very happy with mine for photographic. Easy to mount filters on front, and protects the camera bit too (don't have it open to the 'scope collecting dust during long exposures).

Must confess haven't done much comparison on my F5 newt to see how much it helps. Eric (Ezystyles) always seemed to use one - that's a pretty good recommendation.

toryglen-boy (Duncan) · #7 20-01-2009, 09:20 AM

Quote:

Originally Posted by RobF

Not sure if your interest is visual, but I've been very happy with mine for photographic. Easy to mount filters on front, and protects the camera bit too (don't have it open to the 'scope collecting dust during long exposures).

Must confess haven't done much comparison on my F5 newt to see how much it helps. Eric (Ezystyles) always seemed to use one - that's a pretty good recommendation.

i would be using it visually only. TBH, it looks like a good piece of kit, but i dont know if its for me. Apparently it only works with 2" eyepieces, and you have to screw it onto each eyepiece as you use it, seems like a pain in the backside to me.

toryglen-boy (Duncan) · #8 20-01-2009, 12:24 PM

ok, so i have been reading this, and the kind posts from people, and it makes alot more sense to me, although i am still very unsure.

Can someone clarifiy for me?

Does the corrector have to be threaded onto the back of every eyepiece i wanna use, or can it "sit" inside the 2" focuser, and i can swap 1.25" eyepieces in an out of it (with an adapter obviously) as if it wasnt there?

sorry to be a pain

Satchmo · #9 20-01-2009, 04:01 PM

If you are interested in visual, I'd say forget it. I had a report the other day from an owner of a 20" F4 who reports that after purchasing the suitable spacer adapters for his Ethos 13mm and Nagler 20mm, that the on axis sharpness with the MPCC was clearly much worse than the Paracor which he rated excellent. He promptly threw the adapters back in the box.

In general you need to use the appropriate spacing rings to attach to any eyepiece, though there are a handful of Televues like Radian, Panoptic in 1.25" that you can make a generic 2" adapter and fit the 1.25" EP straight in.

toryglen-boy (Duncan) · #10 20-01-2009, 04:39 PM

Quote:

Originally Posted by Satchmo

If you are interested in visual, I'd say forget it. I had a report the other day from an owner of a 20" F4 who reports that after purchasing the suitable spacer adapters for his Ethos 13mm and Nagler 20mm, that the on axis sharpness with the MPCC was clearly much worse than the Paracor which he rated excellent. He promptly threw the adapters back in the box.

In general you need to use the appropriate spacing rings to attach to any eyepiece, though there are a handful of Televues like Radian, Panoptic in 1.25" that you can make a generic 2" adapter and fit the 1.25" EP straight in.

well, the Paracor is nearly $649 from what i can find online, and if i get that, then i am as well to sell the OTA, put the paracor money towards it, and get something else.

Although i am sure an 8' F4 reflector would be great for someone, special doing photography, it might very well appear in the classifieds soon.

Alchemy (Clive) · #11 20-01-2009, 04:50 PM

i have a Baader Mpcc and use it for imaging. i also have the paracor and use it visually (only occasionally) the paracor does make a difference, but so does using quality eyepeices. both combined produce an excellent result, but then a bigger telescope would help too...... so many choices not enough money.

RobF (Rob) · #12 20-01-2009, 09:20 PM

Yeah - for visual its going to be a lot fussbumming around. See some of those links Erics posted. You need specific spacings for each eyepiece. There's even the proud declaration that some of there customers buy 2 or 3 so they can leave them attached for easy dob use.