SharpCap Forums

Hi Brian, Yep - you've clearly got this all worked out perfectly. I'm not sure of the details of the guy with the Squid, but I am pretty sure that what you are saying is spot on. I got sent a pretty reasonable image of the Dolphin Head nebula taken on a Hyperstar with 100 x 60-second subs - so seein...

Hi Brian, That is very good advice. Where I'm coming from on my question is that there's a guy on the Hyperstar forum who took a very nice image of the Squid nebula using a whole bunch of 10-minute subs. The calculator would give a sub length of less than a minute. He took a bunch of 5-minute subs a...

Hi Brian, That is extremely interesting and links between totally different fields fascinating. One more thing that came to me since the last question. I am not happy with the short sub-exposure times given by the calculator, especially for dim objects. Here's my problem. Suppose the calculator give...

Hi Brian, And there my friend, you have completed the last piece of the jigsaw :D :D :D Thank you so much. So the answer is you can do as well from a city centre as a Bortle 1 zone - IF you are willing to put in all the hours necessary. By the same argument that would mean you can also image objects...

Hi Brian, I got this reply from a World famous astrophotographer, and it really puts my question much better than I did. "Stacking more subs at a light polluted site is a process of diminishing returns. No matter how many you stack after a certain point, the inherent limitation imposed by your ...

Hi Brian, Thank you once again for your excellent replies. And we're beginning to get somewhere (with me), I actually worked out on my own (last night) that the background must actually be "translucent" rather than opaque, so yes, I guess it does then make sense that provided you can spend...

Hi Brian, Just seen your reply - and that's the point where I am completely lost, and you would be in agreement with the guys on the forum - they too are saying you can go as deep as you like if you have enough subs. But I really don't see how that is at all possible. I can see how you can image M81...

Here's the final bit of data from my end that might help with any explanations. Putting the numbers through Robin's calculator for my Hyperstar with a 2600MC-Pro camera and a Bortle 4.5 sky we get a sub-length of 10-seconds. A few weeks ago I carried out the experiment to see what I thought should b...

Hi Brian, Again thank you very much for your time, and your superb explanation - I pretty much agree with all you say. What do I mean by limiting magnitude? I mean what is the faintest thing I can capture with my rig and my background skyglow given (if you like) an infinite number of subs. The peopl...

Brian, Very many thanks for your confirmatory mail. Any chance you could also look at my follow up question to Robin which is what my lack of understanding is really all about. I want to know what are the limiting factors for you imaging hi mag objects. I know it must be directly linked to your skyg...