Discovered some old subs; thought I would see what I could
do with them. 10 x 40secs @ 3200. Usual scope.
Higher res here http://www.astrobin.com/126148/0/
raymo
Last edited by raymo; 07-10-2014 at 04:06 AM.
Reason: link faulty
Thanks Peter, Cam, and Michael. Yes, I like the spikes too. You could, of course, add your own spikes. Different subject, but it surprises me a little that more APO owners don't keep a Newt for those very faint objects that would require enormous amounts of integration time with their APOs. Perhaps they insist on only the finest
images, so don't often image those extremely faint objects.
raymo
Last edited by raymo; 07-10-2014 at 01:13 PM.
Reason: more info
Thanks Peter, Cam, and Michael. Yes, I like the spikes too. You could, of course, add your own spikes. Different subject, but it surprises me a little that more APO owners don't keep a Newt for those very faint objects that would require enormous amounts of integration time with their APOs. Perhaps they insist on only the finest
images, so don't often image those extremely faint objects.
raymo
Some people don't like the spikes. Also Newts are all well-and-good if you can get rid of the coma, but that hasn't been "easy" until the last few years. You also need a bigger mounting too.
...Different subject, but it surprises me a little that more APO owners don't keep a Newt for those very faint objects that would require enormous amounts of integration time with their APOs. Perhaps they insist on only the finest
images, so don't often image those extremely faint objects.
Those fast GSO / Skywatcher Newts are definitely great bang for the buck for DSLR's and OSC CCDs. At risk of getting into the great refractor verses reflector debate - APOs have their place too. That why you gotta have one of each.
Hi Cam, Yes spikes are a personal thing. F/4s have serious coma, but sixes are not bad, and if you can't afford a coma corrector you can crop out most of it. Your mount would make child's play of a nice little 6" f/8
Newt which would have minimal coma, and be cheap as chips; or an 8"
like mine, also cheap bought used. Horses for courses.
raymo
Spot on Kevin. I suspect that at the top end of the hobby there are people that think that if a scope is not an APO it's not really a telescope,
but those people have access to 150 or even 200mm APOs, so they are
not as handicapped as we mere mortals. Wouldn't an 8" APO be great
to own. I think I've wet my pants..
raymo
Well the top end of the hobby have different needs as their cameras are very heavy by the time they add filter wheels and all the gadgets hanging off the end of the focuser. The little GSO Newts would buckle under the load.
Personally if I was allowed only one scope, I'd settle for a 6" F5 or F6 APO. That would do everything I wanted.
If you're wondering why I don't use my 6" F5 and 6" F6 Newts, they are inferior to my ED100 in almost every respect, so I retired them. My 8 inch Newts and the rest need a mirror recoat. Too much bother so I'll just get an 8" OTA when Bill goes away.
Yep, there's a big range of issues you need to compromise on, so no one solution for everything - but mid-sized APOs do tick a lot of boxes, so I can see why they remain popular.
Thanks Rex, coincidence that I found those old subs just after you had posted almost the same shot. I've definitely run out of anything worth playing with, and/or posting.
raymo
nicely and naturally processed.
