SMC 70mm (Canon 70-200mm f4L IS) HOO palette (Hahndorf Astro)

Celestial hemisphere: Southern · Constellation: Tucana (Tuc) · Contains: 47 Tuc Cluster · NGC 104 · NGC 292 · Small Magellanic Cloud · The star β Hyi · The star ζ Tuc · The star θ Oct · The star κ Tuc · The star λ Hyi · The star λ Tuc · The star μ Hyi · The star π Tuc · The star ρ Tuc · The star τ2 Hyi · λ2 Tuc

SMC 70mm (Canon 70-200mm f4L IS) HOO palette, Hahndorf Astro

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SMC 70mm (Canon 70-200mm f4L IS) HOO palette

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SMC 70mm (Canon 70-200mm f4L IS) HOO palette

Testing out the viability of my recently purchased Canon 70-200mm f4L IS lens for astro use in this image.

At 200mm on bright objects I noticed some central vignetting which was solved with Flats calibration - this gradient seems to be absent at the 70mm part of its range though.

I wanted to use this lens with my 2600MM and 7x36mm EFW - this presented a challenge with the currently available ZWO accessories. The smallest (optical thickness) EOS to M42 adapter provided a backfocus distance in excess of the 44mm required for Canon lenses.
A cloudy nights forum post suggested the availability of a TS adapter which would be perfect (albeit with a spacer) - I managed to get one delivered to Australia, and here we are!

Pushed the exposures to 1000sec on this image to see how the lens might perform at extremes.

12x1000s Ha
9x1000s Oiii
HOO palette and Seti Astro NB to RGB stars script for more realistic looking NB stars (enjoying these scripts)

Thanks for looking

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
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Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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Northern lights
Noctilucent clouds
Landscape
Artificial satellite

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

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SMC 70mm (Canon 70-200mm f4L IS) HOO palette

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SMC 70mm (Canon 70-200mm f4L IS) HOO palette

SMC 70mm (Canon 70-200mm f4L IS) HOO palette

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