M8 with small RC

Peter Ward · #1 01-08-2009, 09:29 AM

I was curious to see how these Chinese RC's performed for myself.

http://www.atscope.com.au/BRO/images/GSO/gsom8.html

TrevorW · #2 01-08-2009, 09:45 AM

Are you a convert yet

nice image

Cheers

renormalised (Carl) · #3 01-08-2009, 09:48 AM

Nice shot there, Peter. As you mentioned in your spiel, the image does have a bit more brightness than ones you get out of SCT's. The colours are good. My only quibble is that the image seems a little soft to me, although that might just be my eyes (I've only just got up!!

).

As you mentioned about the field curvature in 35mm, needs a field flattener then. Is the curvature bad or is it just mild??.

Seems like this scope is a goer

Omaroo (Chris Malikoff) · #4 01-08-2009, 09:51 AM

Interesting - and a reasonable image too. It lacks much of the detail of your AP155 capture of the same object (especially within dark lanes in and around the core of the nebula and hourglass), but for the price one would probably forgive that.

http://www.atscope.com.au/BRO/m8ap155.jpg

renormalised (Carl) · #5 01-08-2009, 09:57 AM

How much are they??

Peter Ward · #6 01-08-2009, 09:57 AM

Quote:

Originally Posted by renormalised

....My only quibble is that the image seems a little soft to me, although that might just be my eyes (I've only just got up!!

).

As you mentioned about the field curvature in 35mm, needs a field flattener then. Is the curvature bad or is it just mild??.

Seems like this scope is a goer

I too thought the image data was a little soft, but the scope was "straight of of the box" and needed colimation....which is why I didn't spend as much time on focus as I normally do.

Field curvature is there, but mild.

A goer? Not an RCOS to be sure, but yes. I think so.

Peter Ward · #7 01-08-2009, 09:59 AM

Quote:

Originally Posted by renormalised

How much are they??

Ah...I'm on thin ice here. I'm sure if you check a few dealer websites you'll find a price

renormalised (Carl) · #8 01-08-2009, 10:07 AM

You wouldn't expect it to be an RCOS, but for what its worth it would be a good alternative to spending probably $10-12K for a similar sized RCOS (not that they build one)

renormalised (Carl) · #9 01-08-2009, 10:09 AM

Quote:

Originally Posted by Peter Ward

Ah...I'm on thin ice here. I'm sure if you check a few dealer websites you'll find a price

Confucius say: "If find price pleasing, Andrews will be happy chappy!!"

Peter Ward · #10 01-08-2009, 10:22 AM

Quote:

Originally Posted by renormalised

Confucius say: "If find price pleasing, Andrews will be happy chappy!!"

Nah.. there are better deals out there

TrevorW · #11 01-08-2009, 10:39 AM

Carl try Advanced Telescope Supplies

for $2000 thats $500 cheaper than I paid Andrews for mine

DavidU (Dave) · #12 01-08-2009, 10:43 AM

They seem like a tidy little RC for the money. Esp if they fixed the reflection problem.

renormalised (Carl) · #13 01-08-2009, 10:43 AM

I'll do that...I've got them bookmarked (should've thought of them!!)

pmrid (Peter) · #14 01-08-2009, 11:17 AM

You've achieved a pretty sharp focus in this shot. Did you use the standard GSO focuser or swop in something else?
Peter

strongmanmike (Michael) · #15 01-08-2009, 11:52 AM

Noooo ATS peddling cheap Chinese OTA's

never, what will be next, DSLR's?

A very nice image Peter....might think about getting one

Mike

renormalised (Carl) · #16 01-08-2009, 11:55 AM

Quote:

Originally Posted by strongmanmike

Noooo ATS peddling cheap Chinese OTA's

never, what will be next, DSLR's?

Mike

No....modded webcams

Peter Ward · #17 01-08-2009, 01:10 PM

Quote:

Originally Posted by pmrid

You've achieved a pretty sharp focus in this shot. Did you use the standard GSO focuser or swop in something else?
Peter

The bog standard focuser is actually pretty nice. GSO include a set of large diameter extension rings that screw in *ahead* of the crayford keeping any tilt to a minimum. You can adjust the tension and lock it once in place.

Peter Ward · #18 01-08-2009, 01:17 PM

Quote:

Originally Posted by strongmanmike

Noooo ATS peddling cheap Chinese OTA's

never, what will be next, DSLR's?

A very nice image Peter....might think about getting one

Mike

Nothing wrong with DSLR's

...the Canon 5DmkII is a ripper....just lacks
a 16 bit D/A, high S/N, cooling, stabilized setpoint, dessicated chamber, selfguiding, remote head, adaptive optics...you get the drift

AlexN · #19 01-08-2009, 02:07 PM

Quote:

Originally Posted by Peter Ward

Nothing wrong with DSLR's

...the Canon 5DmkII is a ripper....just lacks
a 16 bit D/A, high S/N, cooling, stabilized setpoint, dessicated chamber, selfguiding, remote head, adaptive optics...you get the drift

Hehehe...

A very nice image Mr Ward... I would love to see the full resolution image!

Alchemy (Clive) · #20 01-08-2009, 02:22 PM

not too bad and it doesnt have the flare problems ive seen on others... i presume this is a later model with a few upgrades ( spacers before focusers as well )