Capabilities of Sky-Watcher evo guide

[Craig a]

Hello everyone, I have a skywatcher evoguide 50mm and would like to use that instead of my Orion st80 as I’m trying to keep abit of weight down and also make my imaging rig abit less tall I have fitted it using guide scope rings bolted down to a losmandy plate on top of my scope now that is done I rebalanced and that has pulled the counterweights closer to the mount which I good news, but my scope is a skywatcher Quattro 10cf with a fl of 1000mm so my question is, is the evoguide capable of guiding my 1000mm scope with the evoguide being only 242mm fl?

[michael8554]

All depends on the size of your guidecam and imaging cam pixels, which will give the relative image scales.

Up to about 4 times is a common quote.

Michael

[Craig a]

My guide cam is the Orion autoguider and my main cam is a cannon 1100d, 

[michael8554]

Here's a calculator:

https://astronomy.tools/calculators/ccd

You enter the pixel size and focal length and it calculates the image scale, 1.07arcsecs/pixel and 4.43arcsecs/pixel

That a ratio of 4.1 : 1

By coincidence the Canon 1100D and the Orion Autoguider both have the same size pixels, 5.2 um

So in this case only it's easy, the ratio of image scales is simply the ratio of the focal lengths, 242mm to 1000mm, or 4.1 : 1

I'd expect that to work for you.

Michael

 

[Craig a]

Thank you for checking that out for me