Schickard region panorama - added 4th Pane including Schiller
Hello,
Here is a 3-pane panorama of the Schickard region under quite striking illumination, captured on 23rd October. The seeing at the time seemed better than my results suggest, so I may have been slightly off-focus, or just forgotten how to use Registax optimally; it’s been such a long time!
Thanks for the nice words guys. Thanks Paul for the 90 deg CW suggestion - you are right; it definitely does look more pleasing to the eye that way. However, I’ve now added a 4th Pane including Schiller from the same session and the rotation benefits are not as marked. I used between 4 and 7 MAP’s for the various panes but I’m a little rusty and had a few problems with blank regions so I had to re-do a couple of the panes – slow work indeed.
For those thinking of embarking on a hi-res career, it’s worth comparing some of the aperture/image scale issues (Matt’s “talk me out of it post”) of a 7” vs. a 12” whilst my post and Mike’s hi-res post are active on the Forum – a very clear and graphic illustration of how aperture, or more precisely, bigger aperture, facilitates hi res imaging as well as giving a smoother, natural look due to the increased resolution and light gathering capabilities of larger ‘scopes. I had the ‘scope pointing at some of Mike’s targets and the resolution and smoothness were well beyond the capability of the Tak, regardless of how good the mirror is or how steady the seeing was.
The main advantage of a larger aperture as I see it is to allow shorter shutter speeds on the camera, giving you more usable frames. I think that's more benefitial that the resolving increase that comes with the larger aperture.
I'm thinking seriously about increasing from my 13.1" to a 15", not for the extra 14% resolving increase, but rather for the 31% increase in light, and so I can run shutter speeds 31% shorter than I do now...
The main advantage of a larger aperture as I see it is to allow shorter shutter speeds on the camera, giving you more usable frames. I think that's more benefitial that the resolving increase that comes with the larger aperture.
I'm thinking seriously about increasing from my 13.1" to a 15", not for the extra 14% resolving increase, but rather for the 31% increase in light, and so I can run shutter speeds 31% shorter than I do now...
cheers, Bird
Thanks Anthony – will that be a Newtonian like your current OTA? If so, will it be custom made or off the shelf?
Cheers
Dennis
PS – I am eagerly awaiting your upcoming planetary posts with the prospective 15”
Nice add of Schiller Dennis. I really think that makes a huge difference.
Bird I reckon there is one more large advantage to more aperture; in that larger image scale can be used with more light. I tried imaging at 10500mm with the 9.25 and that was the very limit of the scope. I just had enough light for the focal length. Even then I had to shoot my blue avi's at 8 fps.
With a larger aperture you can entend your focal length, get more frames per second and have much shorter exposures to boot. :-)
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