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Advice needed - Minimum size needed for scope?

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#1 jriastro

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Posted 22 June 2013 - 03:57 PM

Hello everyone,

If your observatory is a square or rectangle what is the minimum size needed for the scope, mount, pier, etc? I know there is no exact size but what would be an absolute minimum you could put a deep space imaging setup in that would be elevated out of the slide off roof? 5 X 5? 6 X 6? 7 X 7?

This would be for an APM 152/1200 CNC II with a side mounted SV80S, Paramount mount on a Tri-Pier 2 Portable Pier?

Again, just looking for a rough estimate.

Thanks for the help.

#2 roscoe

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Posted 22 June 2013 - 04:11 PM

To help you out, we'd need the scope size, etc, if you plan on being in there with it, and the like.....

I've seen photos of slide-away or flip-top mini-observatories that are about 4x4 and 4-5' tall, but there's no people-space in them.....
Russ

#3 jriastro

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Posted 22 June 2013 - 04:30 PM

Pretty sure the scope is about 42" and 48" when fully extended. Once setup I would rarely be in the room. I would be in the adjoining room controlling the scope. This is for imaging so I would not be in the room with the scope unless it was to move it around, take it down, setup, etc. The ceiling height is about 7' which will be fine. More concerned with length and width minimums.

#4 JJK

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Posted 22 June 2013 - 05:39 PM

If it's just for imaging (i.e., you don't want to do visual work), something under 8'x8' could work. That size RoR observatory accommodates up to an Astro-Physics 175 f/8 and an SBIG STL-11000 camera (built-in filter wheel). I can squeeze myself around the setup if need be.

If you want to do visual work eventually (needs change), I'd suggest 10'x10' (internal) at the very least.

#5 Digital Don

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Posted 22 June 2013 - 08:46 PM

If you have a basement or garage, set up the scope you plan to use in the observatory.

Then, create a rectangle (or square) around the scope using painter's tape in the size you are considering. You'll know immediately if it's too small, too large, or as Goldilocks said, just right!

Don

#6 Mirzam

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Posted 23 June 2013 - 07:25 AM

And don't forget to allow for the wall thickness. For example, an 8 x 8' external dimension shed will have about 7.4 x 7.4' inside dimensions. Or even smaller if you use 2 x 6" lumber.

JimC

#7 Alex McConahay

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Posted 23 June 2013 - 08:48 AM

>>>>>>Then, create a rectangle (or square) around the scope using painter's tape in the size you are considering. You'll know immediately if it's too small, too large, or as Goldilocks said, just right!

Yes, do that, but set the scope into the corner with walls on two sides. The tape will give you some idea, but you could be fooled without real walls rising up. It is a lot easier to pretend with tape that there is room than it is to actually move between the scope and the wall when a physical wall is actually there.

Alex

#8 hottr6

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Posted 23 June 2013 - 10:51 AM

You are always better going bigger, rather than "just right". Like computer disk space, you will always fill it, no matter how large it is.

#9 jriastro

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Posted 23 June 2013 - 02:59 PM

Thanks for the tips everyone. I have a pretty big project planned. Once it's official I'll post more info and pics. Just going through the concept phase at this point.

#10 Scott Horstman

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Posted 23 June 2013 - 10:18 PM

Hello everyone,

If your observatory is a square or rectangle what is the minimum size needed for the scope, mount, pier, etc? I know there is no exact size but what would be an absolute minimum you could put a deep space imaging setup in that would be elevated out of the slide off roof? 5 X 5? 6 X 6? 7 X 7?

This would be for an APM 152/1200 CNC II with a side mounted SV80S, Paramount mount on a Tri-Pier 2 Portable Pier?

Again, just looking for a rough estimate.

Thanks for the help.


The ME requires an absolute minimum of 42" to the wall. The long counter weight shaft is the focus rather than the OTA unless the OTA is 6 or 7 feet long.

#11 Starhawk

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Posted 24 June 2013 - 11:37 AM

I suggest going by the sizes indicated by building codes in your area.

For example, in Tucson, I can go up to 120 ft^2 before it goes from shed to something else. So, sizes like 10X10, 10X12, 8X12, etc. are obvious sizes for a building since the math works out easily and they are "Sheds" where I can do whatever I feel like.

Alternatively, if you have an HOA, you'll need to socialize the concept. Someday the HOAs will all need to go.

-Rich






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