Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Lagoon Nebula  ·  M 20  ·  M 21  ·  M 8  ·  NGC 6514  ·  NGC 6523  ·  NGC 6526  ·  NGC 6530  ·  NGC 6531  ·  NGC 6546  ·  The star 7Sgr  ·  The star 9Sgr  ·  Trifid Nebula
M8,  M20 & M21 on 35mm Film, 


M8,  M20 & M21 on 35mm Film
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M8, M20 & M21 on 35mm Film

Technical card

Imaging telescopes or lenses: Meade LXD 55 SN6

Imaging cameras: Olympus OM-1

Mounts: Vixen GP-DX with SkySensor 2000 PC

Guiding telescopes or lenses: Orion 80ST

Dates:Aug. 8, 2007

Frames: 1x1200"

Integration: 0.3 hours

Avg. Moon age: 24.94 days

Avg. Moon phase: 22.00%

Basic astrometry details

Astrometry.net job: 3320952

RA center: 18h 4' 5"

DEC center: -23° 34' 37"

Pixel scale: 7.870 arcsec/pixel

Orientation: 0.664 degrees

Field radius: 1.537 degrees

Resolution: 780x1170

Data source: Traveller


This is a full-frame image on Elite Chrome 200 35mm slide film. The 20-minute exposure was manually guided through an 80mm f/5 achromatic refractor with dual, stacked barlows (2x and 2.8x) and a 12mm illuminated reticle eyepiece. The telescope was a Meade LXD 55 SN6 6-inch Schmidt-Newtonian, which I still use today.

The blue sensitivity of the slide film I used wasn't all that great compared to its red sensitivity and as a result the reflection nebula part of the Trifid (M20) didn't come through nearly as well as I had hoped. DSLRs are much superior in that regard (and of course in most other ways).


Sky plot

Sky plot


M8,  M20 & M21 on 35mm Film,