Celestial hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  13 Oph)  ·  20 Sco)  ·  21 Sco)  ·  22 Sgr)  ·  23 Sco)  ·  35 Oph)  ·  42 Oph)  ·  6 Sco)  ·  7 Sco)  ·  8 Sco A)  ·  Akrab (β1 Sco  ·  Al Niyat (σ Sco  ·  Al Niyat (τ Sco  ·  Al Thalimain (λ Sgr  ·  Alniyat I  ·  Cor Scorpii  ·  Eagle Nebula  ·  Graffias  ·  IC 4592  ·  IC 4604  ·  IC 4701  ·  IC 4715  ·  Iclarkrau (δ Sco  ·  Kalb al Akrab (α Sco  ·  Lagoon Nebula  ·  M 16  ·  M 24  ·  M 8  ·  NGC 6523  ·  NGC 6526  ·  And 19 more.
Rho Ophiuchi complex wide field, Bret Waddington
Rho Ophiuchi complex wide field
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Rho Ophiuchi complex wide field

Rho Ophiuchi complex wide field, Bret Waddington
Rho Ophiuchi complex wide field
Powered byPixInsight

Rho Ophiuchi complex wide field

Equipment

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Acquisition details

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Description

First light with Sigma Art 18-35 1.8.
I bought it used, otherwise would have went for a prime lens. This was shot at F4.5 and I still see some problems with star shape around the edges. Overall I am happy with the results, love the colors!
This was unguided as is evident by the walking noise.
As the target moved across the horizon (I am at 42 N) I had to increase exposure from 60 to 90 then 120.
I framed it by using live-view and adjusting just until trees were no longer visible.

Comments

Sky plot

Sky plot

Histogram

Rho Ophiuchi complex wide field, Bret Waddington

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