Search found 70 matches

by AllanHall
Thu Jan 24, 2019 4:51 pm
Forum: Introductions
Topic: Greetings
Replies: 1
Views: 1074

Re: Greetings

Good to meet you Paul! Was up in southern BC (Cranbrook) for a short visit last summer, loved it. Welcome, and let me know if I can help.
by AllanHall
Wed Jan 09, 2019 4:16 pm
Forum: Astrophotography
Topic: Light pollution and exposure settings
Replies: 3
Views: 1843

Re: Light pollution and exposure settings

No problem, be sure to post the results and let's see how it works for you.
by AllanHall
Sun Dec 30, 2018 5:22 pm
Forum: General Astronomy
Topic: Filter to Counter Aberration
Replies: 1
Views: 1597

Re: Filter to Counter Aberration

Baader Planetarium makes a Fringe Killer https://amzn.to/2Srnzlf which I have heard good things about, they also make one called the Semi-APO https://amzn.to/2VmXmGi which has had some good reviews. Keep in mind that any filter's performance will depend heavily on your particular scope and eyes. Wha...
by AllanHall
Sun Dec 30, 2018 5:17 pm
Forum: Astrophotography
Topic: Light pollution and exposure settings
Replies: 3
Views: 1843

Re: Light pollution and exposure settings

The first thing I would recommend is to try and use a lower ISO and longer exposures if your mount can track that well. The reason is that the higher the ISO the lower the signal to noise ratio and lower the dynamic range. To explain a little simpler..... When you take an image, stack it and then st...
by AllanHall
Tue May 22, 2018 3:21 pm
Forum: Introductions
Topic: Hello!
Replies: 1
Views: 1217

Re: Hello!

Hey Neil! Glad to have you aboard! No need to wait, if you have questions, lay them on me and let's see what kind of trouble we can get into.

Allan
by AllanHall
Mon May 21, 2018 3:41 pm
Forum: Introductions
Topic: Guess I will start
Replies: 1
Views: 1467

Guess I will start

Howdy! I am Allan Hall, your friendly host and author of the books that probably brought you here. I was born in Spartanburg, SC and grew up in Huntsville, TX where I still live. My wife Sue Ann and several kitties say howdy and meow! I guess my astronomy hobby started around 2012 when I got my firs...
by AllanHall
Mon May 14, 2018 12:34 pm
Forum: Astrophotography
Topic: Total Solar Eclipse, better late than never
Replies: 1
Views: 1895

Total Solar Eclipse, better late than never

Getting the forums back up and running after a couple years of being broken and dormant will undoubtedly be a challenge, so I offer this image to help brighten your day....
total-eclipse.jpg
total-eclipse.jpg (58.42 KiB) Viewed 4795 times
Yes, it was just as much fun, if not more, seeing it with my own eyes as it was to image.

Allan
by AllanHall
Sat May 12, 2018 3:13 pm
Forum: Website
Topic: Updates and more
Replies: 0
Views: 1890

Updates and more

It has been too long since I have done a round of updates to the website, and unfortunately it shows. The past couple weeks have been a lot of work, and that work will continue for a while longer as we bring things back to where they need to be. Below is a partial list of some of the changes, improv...
by AllanHall
Wed Oct 08, 2014 10:32 pm
Forum: Astrophotography
Topic: Astrophotography Equipment
Replies: 7
Views: 11525

Re: Astrophotography Equipment

I do like the short tube 80 but imaging the moon is probably the absolute worst activity you could use that scope for. The amount of color (glowing purple halos around objects) present on nebulae and star clusters is generally manageable as long as you stay away from ones with exceptionally bright s...
by AllanHall
Mon Aug 11, 2014 6:19 am
Forum: Astronomy / Astrophotography related books
Topic: Field Flatteners, Back Focus
Replies: 1
Views: 3055

Re: Field Flatteners, Back Focus

Generally the field flattener attaches to the camera with a T-Ring, this ring can increase the backfocus by up to 10mm. In addition, they sell T-Thread spacers that go between the field flattener and the T-Ring in increments of 10mm, 20mm and 30mm (separately or in a kit with all three sizes). These...