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qhy mini guidescope

Posted: Thu Apr 13, 2017 7:56 am
by Burly
Having recently purchased a qhy mini guide scope,used with a qhy5l-11 would i be able to use this with the polar align feature in sharpcap would the fov be adequate ,or would i be better putting in the focuser of my sw 200p .thanks dave
miniGuideScope Specification
Focal length
130mm
Diameter
30mm
F/ ratio
F4.3
Camera Interface
C/CS mount
OTA diameter
31.6mm(Same with QHY5-II series)
Focuser
Front Part Focuser with digit mark and locker
Weight
120g
31293433310_1f3efefa9a_z.jpg
31293433310_1f3efefa9a_z.jpg (96.47 KiB) Viewed 2174 times

Re: qhy mini guidescope

Posted: Thu Apr 13, 2017 7:28 pm
by admin
Hi,

yes, that should be fine - if you search for a 'field of view' calculator online and put in the focal length of the guider and the sensor size, you should come out with a field of view somewhere in the 1.5-2 degree range (wider than for the standard 200mm focal length guiders)

cheers,

Robin

Re: qhy mini guidescope

Posted: Fri Apr 14, 2017 8:42 am
by Burly
Thanks Robin ,will update once i get a chance to see how i get on

Re: qhy mini guidescope

Posted: Mon Apr 24, 2017 8:58 pm
by Burly
UPdate, succesful PA with the qhymini guidescope/qhy5l-11 once i was in the required FOV ,took me a while but that was down to me,

Re: qhy mini guidescope

Posted: Mon Apr 24, 2017 10:07 pm
by admin
Excellent - glad to hear it worked :)

Robin

Re: qhy mini guidescope

Posted: Sat Jun 23, 2018 7:50 pm
by Burly
Just an update ,i was struggling to pa in sharcap using sharpcap PA ,i struggled to solve in the first part then when slewed 90 Deg ,failed ,so i changed to a 12mm cctv lens instead of the mini guide scope much easier solved easily ,once i had reverted back to the miniguide scope i rechecked PA this time no problem solving i assume this is because the FOV is smaller using the 130mm FL of the miniguide scope ,so if you do use the miniguide scope you really need to be close to PA for it to work ,as my mount is on a pier i should be able to use the mini guidescope from now on but if you struggle try a 12mm cctv lens £5 ish off ebay, on qhy5l-11, you need the 5mm CS mount not the c mount , i had to shim it approx 2mm making it approx 7mm to reach infinity focus
hope this may be of help to someone .

Re: qhy mini guidescope

Posted: Fri Aug 17, 2018 7:18 am
by MrAstroBen
Burly,
I plan on using the polar align for my Astrotrac alignment. The polar scope works fine at 180mm but when i get around to it, was going to test a 400mm lens; expecting to need spot on alignment.

For this i was looking at the QHY MINIGUIDESCOPE but you have used a CS lens? Sounds interesting if you have more details please.

I wonder if one of the right fl. Could be used for both alignment and guiding. My Altair 290M has CS adapters and i have the tripod clamp. In theory i could mount one in a rigid and lightweight format to the 400mm lens.

Thanks Rob

Re: qhy mini guidescope

Posted: Fri Aug 17, 2018 3:57 pm
by admin
You can buy 25mm C mount lenses with variable aperture from ebay (delivered from China) for about £12. They are incredibly useful - I have several for testing various cameras. If you can't wait the 2-3 weeks for delivery from china then you can get them for about twice the price from local stock sellers.

Something like this :

https://www.ebay.co.uk/itm/Television-T ... SwK7xbdtdq


Robin

Re: qhy mini guidescope

Posted: Wed Sep 05, 2018 6:10 am
by MrAstroBen
Not had chance to test yet but picked up a cheap 16mm cs lens. FoV is much larger than 2deg but if Burly had success with a 12mm its worth a try.

I also have a light nikon lens (330g) 70-200mm i can mount on the 290M with a TS filter box.

After polar aligning i can easily remove as have fitted using an arca plate. Or could leave on and dual image or guide. Still weighs less than a 50mm guide scope and hardware.

Will see which works when get a clear weekend.

Re: qhy mini guidescope

Posted: Wed Sep 05, 2018 7:41 am
by turfpit
Rob

I use one of these for bench testing cameras.
CCTVlens.JPG
CCTVlens.JPG (26.21 KiB) Viewed 1355 times

I bought 2 off eBay for around £11 including postage from China (how do they do that?) They are CS mount. You can borrow one to try if you want - contact me by email.

Dave