I've recently bought a very reasonably priced Aquila 90mm 500mm Refractor.
These are made by the "Yuzhong Optical Instrument Company" and available from Chinese sellers on eBay.
It comes with a"Vixen" style Dovetail so it went straight on to my EQ5 Mount.
Cost: Optical Tube Assembly = $360 free shipping
Diagonal = $100
Finder Scope = $100
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| DewShield/Hood Extended |
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| DewShield/Hood Retracted |
I've fitted it with a Bintel (GSO) 2 inch mirror diagonal and 1.25 inch adapter. It came with a T mount tube so after purchasing a T ring for my camera I was set to go. I also bought a Bintel 50 x 8 Right Angle Finder, I like it, but don't use much as the laser pointer is fantastic.
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| "Bintel" (GSO) Diagonal with 1.25mm Adapter and Eyepiece |
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| DIY 6V Regulator and RA Controller Clipped to Leg with some PVC tube |
My first pictures showed quite a lot of purple fringing, which I could reduce in post processing but I wasn't really happy.
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| This is a 4 sec exposure (All I had left after deleting longer exposures) RAW converted to jpg straight out of camera no filter |
This is the first output from the scope and filter. I'm very happy now. Light Pollution and "Purple Fringing" suppressed. Which makes sense, as the filter cuts off a lot of the blue end of the spectrum.
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| This is a 20 sec exposure RAW converted to jpg straight out of camera with CLS Filter. This is one of the "sub frames" used in the next image |
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Eta Carinae and Nebula NGC 3372
Approx 7,500 Light Years from Earth
Location: Melbourne Australia "Bortle 6" Scope: Aquila 90mm f5.5 Refractor Filter: "SVBony" "CLS" Light Pollution
Imager: Fuji XT1 at Prime Focus 2inch diameter extension tube through "T mount"
Mount: SkyWatcher EQ5 RA motor Drive
Stack of 25 x 20 sec asa 6400 Raw "subs"
Stacked using "Lynkeos"
Post Processed in "GIMP" 17-4-2018 |
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| Southern Pleiades Just a test image using the CLS Filter |
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| Running Chicken Nebula Location: Melbourne Australia "Bortle 6" Scope: Aquila 90mm f5.5 Refractor Filter: SVBony CLS Light Pollution
Imager: Fuji XT1 at Prime Focus 2inch diameter extension tube through "T mount"
Mount: SkyWatcher EQ5 RA motor Drive
Stack of 20 x 30 sec asa 6400 Raw "subs"
20-4-2018 |
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| Tarantula Nebula Distance: 160,000 Light years Part of the "LMC" Galaxy Location: Melbourne Australia "Bortle 6" Scope: Aquila 90mm f5.5 Refractor Filter: SVBony CLS Light Pollution
Imager: Fuji XT1 at Prime Focus 2inch diameter extension tube through "T mount"
Mount: SkyWatcher EQ5 RA motor Drive
Stack of 25 x 25 sec asa 6400 Raw "subs"
22-4-2018 |
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Rosette Nebula NGC 2244
Distance: app 5200 Light Years
Diameter: app 170 Light Years
Location: Melbourne Australia "Bortle 6"
Scope: Aquila 90mm f5.5 Refractor Filter: SVBony CLS Light Pollution
Imager: Fuji XT1 at Prime Focus 2inch diameter extension tube through "T mount"
Mount: SkyWatcher EQ5 RA motor Drive
Stack of 15 x 60sec 6400asa Raw "subs"
31-1-2019 |
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Orion Nebula
1344 light years away
Location: Melbourne Australia "Bortle 6"
Scope: Aquila 90mm f5.5 Refractor
Filter: SVBony CLS Light Pollution
Imager: Fuji XT1 at Prime Focus 2inch diameter extension tube through "T mount"
Mount: SkyWatcher EQ5 RA motor Drive
Stack of 45 x 30 sec asa 6400 Raw "subs"
31-1-2019 |
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Horse Head and Flame Nebula
Location: Melbourne Australia "Bortle 6"
Scope: Aquila 90mm f5.5 Refractor Filter: SVBony CLS Light Pollution
Imager: Fuji XT1 at Prime Focus 2inch diameter extension tube through "T mount"
Mount: SkyWatcher EQ5 RA motor Drive
Stack of 50 x 30 sec asa 6400 Raw "subs"
28-1-2019 |
3 comments:
Great article Nojy. How does the telescope handle CA?
Is it crystal clear?
Thanks
Crystal Clear?..No, but pretty good with the filter in place. I'll let the pictures show what can be achieved. I use Rawtherapee for pre process with a little bit of fringing adjustment. I don't use it visually much but when I do I'm pretty happy.
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