Swansea Astronomical Society Blog

Saturday, March 15, 2014

 

The Sun in white light with AR2005 moving onto the disk as the largest sunspot

A Fujifilm Finepix S8200 Bridge camera was fitted with a Baader solar filter, set to ISO 100, f/6.5 at 1/800s exposure and mounted on a Merlin, auto-tracking mount. The camera was set to its maximum of 40x zoom. Five sets of 10 images were captured in rapid succession in burst mode. The best 40 images were stacked in Registax 6 to produce the final image Which shows AR2005 and other sunspots on the disk as well as prominent, faculae. Click on the image to get a larger view:



Steve Wainwright

Friday, March 14, 2014

 

History of telescopes and a new 8" Zerochromat, folded optics refractor.

This evening Peter Wise gave a fascinating lecture on the history of the telescope. He provided compelling evidence that optical devices may have been used in antiquity to make astronomical observations, as well as bringing the history up to date.


He brought an example of his 8" Zerochromat, folded optics refractor for the Swansea Astronomical Society to see:
Peter with his telescope

Gaynor sizing up the scope

After the lecture we set up the scope outside in the university grounds where we observed the Moon and Jupiter through the scope:


12 images were captured at ISO 400 at the prime focus of the scope. The images were stacked in Registax 5 to produce the final image. Click on the image to get a larger view:

Superb, good contrast views of the Moon were had at the eyepiece and also photographically.
By the time everyone had viewed the Moon and the scope was slewed to Jupiter, the front lens was misting up, so no meaningful opinions could be formed on the planetary view.





The telescope is large, but it was light enough to be easily manageable for carrying and mounting on the EQ6 mount. The scope is of unique design that solves some of the problems of refractors in a novel way.
Many thanks to Peter for bringing this example of his telescope for members of the SAS to see, and to try out.

Steve Wainwright

Thursday, March 13, 2014

 

87% waxing, gibbous Moon

A Fujifilm Finepix S8200 Bridge camera was set to ISO 100, f/6.5 at 1/250s exposure and mounted on a tripod. The camera was set to its maximum of 40x zoom. Two sets of 10 images were captured in rapid succession in burst mode. The images were stacked in Registax 5 to produce the final image. Click on the image to get a larger view:


Steve Wainwright

Wednesday, March 12, 2014

 

The Moon with a Samsung Galaxy S3 smartphone and an 8" Newtonian

A Samsung Galaxy S3 smartphone was used to take afocal images of the Moon through an 8" Newtonian. Click on an image to get a larger view.



Dave Evans

Tuesday, March 11, 2014

 

The Sun in White light with a bridge camera

A Fujifilm Finepix S8200 Bridge camera, set in B/W mode, was fitted with a Baader solar filter, set to ISO 100, f/6.5 at 1/1200s exposure and mounted on a Merlin, auto-tracking mount. The camera was set to its maximum of 40x zoom. Five sets of 10 images were captured in rapid succession in burst mode. The best 40 images were stacked in Registax 6 to produce the final image Which shows many sunspots on the disk as well as prominent, faculae. Click on the image to get a larger view:


Steve Wainwright
 

Jupiter

A DBK21AS camera fitted with a 1.5x Barlow was used with an 11" SCT to capture an AVI of 5000 frames of Jupiter. The AVI was stacked in Registax 5 to produce the final image.


Keith Davies

Monday, March 10, 2014

 

63% waxing, gibbous Moon

A Pentax Kx DSLR was placed at the Cassegrain focus of a 127mm Maksutov. Using a remote control, 30 RAW images were captured of each of two overlapping segments of the Moon. The images were stacked in Registax 5 and the resulting two images were merged in Microsoft ICE. Click on the image to get a larger view:


Steve Wainwright

Sunday, March 9, 2014

 

The Sun in H-alpha and Ca K-line light

A DMK21AS was used to capture AVIs of  four overlapping quadrants of the solar disk. Two solar scopes were used, a Solarmax ll 60 BF15, H-alpha scope and a CaK PST scope. The AVIs were stacked in Registax and the resulting images were combined into a single image revealing the information from the red H-alpha and the UV Ca K-line light. Click on an image to get a larger view:

H-alpha image

Ca K-line light

Combined H-alpha and Ca K-line data

Steve Wainwright

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