First Jupiter of the year 10-7-11Posted By Dale Conrad |
very nice Andreas, Thanks for sharing.
Posts Made By: Dale Conrad
October 10, 2011 02:53 PM
Forum:
CCD Imaging and Processing/Solar System
October 16, 2011 03:13 PM
Forum:
CCD Imaging and Processing/Deep Sky
Abell 61 + Another Unknown Object (?)Posted By Dale Conrad |
Chris,
I found another Abell61 on the net for a comparison. Nothing but the same star patterns were found. After looking at your image a little harder, I think the randomness of noise is the culprit. Nice capture anyway.
I found another Abell61 on the net for a comparison. Nothing but the same star patterns were found. After looking at your image a little harder, I think the randomness of noise is the culprit. Nice capture anyway.
October 30, 2011 02:32 AM
Forum:
CCD Imaging and Processing/Solar System
jupiter from atlPosted By Dale Conrad |
Very Nice
October 31, 2011 02:24 PM
Forum:
Equipment Talk
Resolving power - terrestrial / target shootingPosted By Dale Conrad |
A 4 to 5 inch aperture would resolve the holes, 100 to 120mm. In reality, the limiting factor in target shooting would be the mirage. Almost any sun at all would make most views at high power very unstable. If you look at a terrestrial target at about 500 yards with a 100 to 120mm scope at 100X you will see what I mean.
Dale
Dale
November 6, 2011 11:26 PM
Forum:
Digital SLR AstroPhotography
NewbiePosted By Dale Conrad |
Try about f8 1/500 sec asa 400
Dale
Dale
November 8, 2011 11:44 PM
Forum:
CCD Imaging and Processing/Deep Sky
Question about guide camera and image camera placePosted By Dale Conrad |
The movement in degrees is what matters as long as you have no flexure between scopes and cameras the relative positions will remain the same.
Dale
Dale
November 28, 2011 01:30 AM
Forum:
CCD Imaging and Processing/Deep Sky
Heart of the Heart - Melotte 15Posted By Dale Conrad |
Very nice Jim.
December 6, 2011 04:46 AM
Forum:
Beginning Astronomy?
Polar alignmentPosted By Dale Conrad |
As far as I know declination drift will be the most accurate. For visual observation, you can get pretty close in ten to fifteen minutes. For a new setup, level the mount and set the polar axis to your latitude, make a good guess on north. Do the azimuth drift first. If you have set the latitude to within a degree or so, you will probably be good to go for visual observing, even though you may have to do a little star hopping to find your targets. If you are setting up in the yard, mark where the tripod legs go and you won't have to re find the starting point. For photography, you will want to go through a couple of iterations.
December 27, 2011 04:01 AM
Forum:
Beginning Astronomy?
field reduction factorPosted By Dale Conrad |
That would be a comparison to a 35mm film full frame. At prime focus the focal length is that of the telescope. The field of view of the DSLR is calculated using the chip size and scope focal length.
December 28, 2011 05:27 AM
Forum:
Guns and Hunting Optics
Semi or Revolver for Concealed Carry?Posted By Dale Conrad |
If you carry a semi-auto have one in the chamber, racking a slide during a draw is time consuming and dangerous. If you are going to carry, the one to carry is the one you feel the most comfortable with.
Funding Member
