chris gunn

Perhaps he pointed the camera north (not too hard at night) and it said: 15deg

That is pretty funny, and helpful! Perhaps a powerful magnet aligned to assist the compass would allow optimal performance.

Some nice dust detail in the first two. I'm guessing the 2nd is a pano. The last has some fun sky/weather colours. That's over 1gb. I have played with other's pics before, like this one by Warren, ...

Most people here do exposures longer than 30s, and I think most cameras don't support DFS for that. Also you don't need as many dark frames as bright frames,  so doing an equal amount of dark ...

ebay, for Pentax.

Thanks for posting. Some people stack over 300 frames, and capture over many days, so you can continue to add to your pics, like your M31. How do you do your calibration?

Another big job! I bought an IR remote shutter from China for $2 or so. I haven't used it yet.

I've seen it before, but I've bookmarked it now. Ok, that's the worst example I've seen. It's on full frame though, on APSC I guess it would be like barrel.

Do you mean "how to reduce the noise resulting from long exposures"? People use Dark Frame Subtraction for that. Maybe you are asking about a camera function? If you are getting banding or other ...

I noticed it was a bit soft in the corners, but didn't know about these other faults! A sharp lens, but I've only ever noticed the.. moustache? distortion when it's pointed out. I guess you did a ...

As entertaining as always!

Another new one for me, thank you. Just how many subjects are on your list?

I forgot to say, my estimate is from: 200mm/300mm x 80s/cos (41deg) 80s is the official figure for 200mm 0deg for the K1. 140s is the official figure for 200mm 45deg, so my estimate may be low.

I haven't tried longer than 50mm yet. My success rate is not 100%, it can be confused easily by metal and cell phones etc, watch the compass to see how sensitive it can be. Best used far from any ...

That's some good air! Your pics don't include aperture in the Exif.

With astrotracer, you can expose longer instead of having a bigger aperture. It's just more time consuming, and the sky moves making panos awkward. I'm trying to make a list describing Pentax lens ...

The R Clark MW pics from that site I showed you, are mostly pano's with a 35/1.4. The low res samples look very fine. Be warned, wide rectilinear will perform badly in corners with astrotracer. IE ...

No. You would need to manually use the shutter/remote shutter cable/IR. The Astro pros tend to use ISO 1600-3200. The article says: "It is best to image at the lowest ISO that gets above those nois ...

Scary! I feel your frustration. I did a stack at 21mm, and I couldn't edit it to be nice. I think they look best coming out of a object on the horizon for context, with the atmosphere light and ...

Same here. Cloudy for about a month. I finally bought a gps unit for my K5, and here is my only attempt using it. I did a wee 3x3 pano with the 43mm at f4.5, 60s, iso 800? The green and red are ...