Bob in Baltimore

Thanx Greg. I am quite familiar with The Photographers Ephemeris. Sure beats my astronomy programs, a printed map & a protractor! But it doesn't solve the problem of assuring an unobstructed view ...

The Big Island of Hawaii is a special case for orographic clouds and you chose well. It is very common to get orographic clouds topping out at 10,000 to 12,000 feet, well below the 14,000 foot ...

I agree with Roger. Daytime cloud build-up ("orographic clouds" ) are a significant concern in the mountains. See two sample images below and a schematic of how they occur below that. I plan to be ...

This morning as we had a leisurely breakfast on our porch, enjoying the cool, sunny morning, I noticed the chipped piece of Pyrex “Oven Ware” that my wife had placed on the table. It was part of a ...

Dr. Luigi Boschetti and Andrea Melchiorre of the University of Idaho have put together a wonderful map showing the probability of cloud-free viewing across the entire path. It is based on analysis ...

Very nice!! Registax handles bad seeing, and that is exactly what you had!

<snip> <snip> As another retired NASA guy, let me suggest that you follow the kind of system engineering concepts that we use in NASA in developing instruments and spacecraft. First we analyze what ...

Nice image Russ, but ... There is something strange about it. Somehow there appears to be a shadow on the B ring to the right, but this is not possible 3 weeks after opposition. And the shadow ...

Russ was kind enough to run my 1972 image thru Registax to see what it could do. There was only one image, but it still made it better. Still wish I had kept those other "identical" shots. Maybe ...

Damn! I originally had perhaps a half dozen Ektachrome sildes of Saturn. But what was the point of keeping 6 "identical" slides? Wish I had kept them. (My originals are better than your single ...

Very nice Russ. And once again I am reminded of what four and a half decades of technology can do, especially when coupled with such skill and attention to detail. Here is an image of Saturn that I ...

The results are in! Thanx to all who contributed. As I noted in my "bump" post, you covered the territory with classic landscape images, classic architectural images, nature images, clever ...

Challenge is closed. I will announce results later today. Thanx to all for the interesting responses!

We have had some great entries; you have covered the territory with classic landscape images, classic architectural images, nature images, clever compositions, humor, and made up scenes. It will ...

Been there. Done that! Welcome to the club.

This advice is completely wrong. If the image is too bright, you need to use a lower ISO and/or a shorter shutter speed. The advice given in the link is, however, good. Swimswithtrout has given you ...

Thanks to swimswithtrout for selecting my entry in Challenge 246: Shoot the Moon. There was a fun selection of images and I picked up a few ideas for future shots. Nice work folks! Challenge 247 - ...

Taken with a Friend's 630 mm focal length telescope and my Nikon D619.

I don't know if this meets your rules. It is a stack of 10 images with a total exposure time of 36 seconds. ISO was 6400. A D810 was attached to a 155 mm (diameter) telescope.