TecnoSky Owl 90/540 first images

[drjolo]

Owl refractor is with me since February this year, so I decided to share some images that I captured using that glass and APS-C format cameras. I use 0.8x adjustable flattener from TS https://www.teleskop-express.de/shop/product_info.php/info/p12209_TS-Optics-REFRACTOR-0-8x-corrector-for-refractors-up-to-102-mm-aperture---ADJUSTABLE.html and CEM26 mount. All data was captured under my suburban sky with sky brightness level usually around 19-19.5 mag/arcsec2. 

First light went to M45 - it is 150x1 minute captured with QHY247C color camera.

Also with the same color camera another frame around Tadpoles nebula. 7 hours of total exposures

And Christmas Tree cluster area - 5 hours of total exposure

Then I switched to mono QHY268M and the first target was two globular clusters: M53 and NGC5053 - 240 minutes of LRGB frames with 2 minutes subs:

Pinwheel galaxy - 340 minutes with QHY268M, LRGB filters and 2 minutes subs

IC1805 nebula - Ha only, and RGBHO composite. 10h Ha, 6h Oiii, 2h RGB. 

Comparison of Melotte 15 fragment captured with 90mm refractor and 254mm SCT (the same location - my backyard):

Distant objects around M82 - enlarged and 1:1 cropped fragment - 310 minutes of luminance with Owl and QHY268M camera:

IC405 and 410 area - RGBHO composite with QHY268M camera. About 10 hours of total exposure with RGB and HO filters. 

And Sun captured with QHY268M camera, 2x barlow and Baader SC filter (plus mylar filter of course). I forgot about IR cut filter It improves SC images, because SC passes some IR light as well. 

I am quite happy with the images that refractor creates. The plan was to have a setup with APS-C format that operates around 450mm FL, because I have never had that combination. I imaged so far with either 135mm lens, or 800-1700mm telescopes. I expect now many 3x2 degrees frames to land into my disk  

 

Edited May 6, 2022 by drjolo

[Astroscot2]

Wow, what a collection of great images , you have been busy !

 

Mark

[josefk]

Wow! All absolutely lovely. Nice to see in your capture of M53 the two bright stars i see in the EP visually and where NGC 5053 is in relation to them and M53 as i haven't yet been able to see this cluster. Your picture will help me far more than a star chart next time i try 🙂. Thanks in advance!

[drjolo]

Thank you - yes, it was a several busy nights. New scope, new camera and as usual I wanted to catch as many common targets as possible Now I will spend more time on each, but I am thinking about replacing my HOS filters (old Baader CCD) to some 3 or 4 nm ones, because LP becomes more and more pain at my location  

[drjolo]

Just processed some data captured already in March. 90mm refractor is maybe not the best option for small targets, but since it has "owl" in its name, I could not miss that target

Tecnosky 90/540 Owl, 0.8x FF/FR, iOptron CEM26, QHY268M, LRGB 120x2 minutes. Suburban sky, transparency good, Bortle 6, march 2022. Larger version after click.

[Ratlet]

19 hours ago, drjolo said:

Just processed some data captured already in March. 90mm refractor is maybe not the best option for small targets, but since it has "owl" in its name, I could not miss that target

Tecnosky 90/540 Owl, 0.8x FF/FR, iOptron CEM26, QHY268M, LRGB 120x2 minutes. Suburban sky, transparency good, Bortle 6, march 2022. Larger version after click.

Really nice framing on this.

[Roy Foreman]

Nice set of images, well done.

[Mr Spock]

Super images. Great to look at 👍

[drjolo]

I have now mounted this refractor in my roll-off shed, so all the following images was made using old but capable EQ6 mount

Other equipment used: TecnoSky 90/540 Owl, 0.8x adjustable FF/FR, QHY268M camera, Baader 36mm CCD filters and my suburban sky with sky brightness level usually around 19-19.5 mag/arcsec2. 

 

Cr399 Coathanger asterism, about 3 hours of exposures with LRGB filters. Cr399 was discovered in 1931 by Per Collinder as an open cluster. Then 40 years later it turned out these stars are located at different distances actually  

 

Sh2-155 Cave nebula - about 18 hours of exposure with HSO narrowband filters plus 1 hour RGB for stars. 

 

Sh2-171 emission nebula in Cepheus. Several dark clouds inside with Berkeley 58 open cluster in the upper right part of the nebula. About 18 hours of exposures via HSO filters plus about 1 hour RGB for stars. 

 

IC5146 Cocoon with Barnard 168 dark tail - LRGB exposures 200:80:60:50 x 2 minutes. Some galaxies can be spotted between all these stars (second image)

 

Veil in Cygnus - two panels mosaic, each panel is 6 hours of exposure.  With and without stars.

 

Several Barnard dark clouds (169, 170, 171, 173, 174) and LDNs near Zeta Cephei star. LRGB 180:40:20:30 x 2 minutes. 

 

Sh2-132 "Lion" nebula in Cepheus. It eventually appeared much fainter than I expected, so processing was not so easy for me. 18 hours of data with HSO narrowband filters.
Small blue dot in lower right part is a PN G101.5-00.6 planetary nebula - 1.3 arcmin diameter.

 

More data is already in the way through space