Rho Ophiuchi (Hypatia Demeter Alexandria)

Celestial hemisphere: Southern · Constellation: Ophiuchus (Oph) · Contains: IC 4603 · IC 4604 · IC 4605 · M 4 · NGC 6121 · Part of the constellation Scorpius (Sco) · The star 22Sco · The star Al Niyat (σSco) · The star Antares (αSco) · The star οSco · The star ρOph · The star τSco · The star ωOph · rho Oph Nebula

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Rho Ophiuchi

Link: https://flic.kr/p/2jpgzX6

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Rho Ophiuchi

Link: https://flic.kr/p/2jpgzX6

The Rho Ophiuchi molecular cloud complex in Scorpius. captured 30x70" with my new Pentax super-takumar 135 on July 21 hoping to compare it to the images produced by my Pentax-k 135. unfortunately my mount died before I could get a full hour in on the target so I decided to combine this data with data I captured back in May. The verdict is that the Takumar is slightly sharper and better corrected for chromatic abberation, but it comes at the cost of less light gathered and coma in the corners. I will likely use both lenses going forward, perhaps this could be the birth of a dual imaging setup down the road.

canon rebel sl1, skywatcher star adventure

30x70" pentax super-takumar 135/3.5 @ f/~4.5 captured 7-21-20

14x90" pentax-k 135/2.5 @ f/3.6 captured 5-13-20

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	3694273
PixInsight job	n/a
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