Robin,
I'm looking at getting a longer-FL guidescope, but do not want to compromise my Sharpcap PA, which has been working fine.
I'm looking at new guidescopes in the 60/F4/240mm class, and combined with my current Altair camera, Astronomy.tools tells me that the chip will see a FOV of 1.14 x 0.86 degrees.
Is this FOV sufficient for PA?
Thanks!
- Bob
Yet another guidescope question
Re: Yet another guidescope question
I use a 285mm focal length with the Altair 1280x980 pixel chip,
Which gives only a 1x0.7 degree field I think.
Works fine, but i have to orientate the camera so that when i rotate the Ra axis, it moves horizontally on the longer side of the field, if you get my meaning.
Has never failed yet.
Which gives only a 1x0.7 degree field I think.
Works fine, but i have to orientate the camera so that when i rotate the Ra axis, it moves horizontally on the longer side of the field, if you get my meaning.
Has never failed yet.
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Re: Yet another guidescope question
Andy,
Thanks! So, just to be clear - Portrait/vertical orientation at the start, and then rotate to landscape/horizontal orientation to finish?
- Bob
Thanks! So, just to be clear - Portrait/vertical orientation at the start, and then rotate to landscape/horizontal orientation to finish?
- Bob
Re: Yet another guidescope question
yep thats about the size of it Bob.
I find that Sharp cap doesn’t need a full 90 of the RA axis rotate to work either,
Just gives a bit of breathing space by setting the camera portrait.
I find that Sharp cap doesn’t need a full 90 of the RA axis rotate to work either,
Just gives a bit of breathing space by setting the camera portrait.
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Re: Yet another guidescope question
Hi,
Yes that guide scope should be perfectly fine, It's when the field of view darts to get down towards 0.5° as a maximum dimension that polar alignment tends to have trouble.
Cheers, Robin
Yes that guide scope should be perfectly fine, It's when the field of view darts to get down towards 0.5° as a maximum dimension that polar alignment tends to have trouble.
Cheers, Robin