Hemisphere:  Northern  ·  Contains:  NGC 2239  ·  NGC 2244  ·  Rosette nebula  ·  The star 12Mon
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First light - ZWO ASI533MC Pro + Duo-Band Filter, 


            Ivaylo Stoynov
First light - ZWO ASI533MC Pro + Duo-Band Filter
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First light - ZWO ASI533MC Pro + Duo-Band Filter

Technical card

Imaging telescopes or lenses: William Optics Megrez 80 FD

Imaging cameras: ZWO ASI533MC Pro

Mounts: iOptron CEM60

Guiding cameras: QHY5L-II Mono

Focal reducers: William Optics FF/FR 0.8x II

Software: PixInsight PixInsinght 1.8 RC7  ·  PHD guiding  ·  photoshop  ·  APT - Astro Photography Tool

Filters: ZWO Duo-Band

Accessory: OAG

Dates:Dec. 8, 2019

Frames:ZWO Duo-Band: 61x180" (gain: 100.00) -20C bin 1x1

Integration: 3.0 hours

Avg. Moon age: 11.16 days

Avg. Moon phase: 85.97%

Basic astrometry details

Astrometry.net job: 3119565

RA center: 6h 31' 49"

DEC center: +4° 58' 40"

Pixel scale: 3.453 arcsec/pixel

Orientation: 227.302 degrees

Field radius: 0.992 degrees

Resolution: 1500x1424

Locations: Nedelkovo, near Sofia, Bulgaria

Data source: Backyard


Last weekend got a clear night and decided to take first light with ZWO ASI533MC Pro. The Moon was quite near to full, but still was giving around 1h 30 minutes darkness - good chance to make some tests of the ZWO Duo-Band Filter too. Additional performed test was the usage under the skies of APT's support for the ZWO native driver :)

As target picked-up an object that is well known with idea that can show the performance of the camera itself. BTW I have never imaged the Rosette so far, and it is still in my list for a narrowband attempt :)

The first revision is comparison of single frames, auto stretched - one when the Moon was high above the horizon, the second was few minutes after its setting.

The second revision the processed image taking all available frames 50 with Moon and 11 without. Used is the unity gain for the camera - Gain 100, Offset 70.

Having some experience with DSLRs I'm very happy with the results from ZWO ASI533MC Pro as color camera. No darks or bias frames are applied! Just dithering and cooling to -20C :) In the net saw some opinions that this camera is good entry level for imagers coming from DSLRs. There is need to make few serious sessions without Moon, however on this stage, my opinion is that ASI533MC Pro is great OSC that can give very good data when there is no time to make LRGB with mono camera. My plan is to use it as main imager during astro parties :)



Ivaylo Stoynov
License: None (All rights reserved)


  • First light - ZWO ASI533MC Pro + Duo-Band Filter, 


            Ivaylo Stoynov
  • Final
    First light - ZWO ASI533MC Pro + Duo-Band Filter, 


            Ivaylo Stoynov

Sky plot

Sky plot


First light - ZWO ASI533MC Pro + Duo-Band Filter, 


            Ivaylo Stoynov

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