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Making Every Photon Count A Beginner’s Guide to Deep Sky Astro-photography.

 A new book by Steve Richards Aimed at the beginner to Deep Sky astro-photography, new concepts are explained in plain terms ensuring the reader develops an understanding of the equipment and its use. Advice is based on tried and tested methods aimed at producing acceptable results early on by drawing on my own experiences as a beginner and those whom I have assisted in the past. The logical progression of an imaging session and subsequent post processing of the images is explored in depth in an easy to read and understandable style with numerous illustrations and examples to lead the beginner through to more advanced topics.

To be published shortly, it is hoped that this book will fill a gap in the list of publications aimed at the astro-photographer. Many excellent books on the subject of astro-photography are essentially showcases for the author’s work using the latest state of the art equipment acquired over many years using methods honed through long experience of imaging. Although without doubt these books give the reader something to aspire to and the images are, of course, a very important and worthwhile part of any book, the ‘high end’ nature of the equipment in use is often far removed from the realistic purchases of the beginner. This book seeks to redress this by discussing the use of equipment more in keeping with the beginner’s budget.

The book goes to some lengths to discuss the minimum requirements as well as the more desirable equipment that would be on many a beginner’s ‘wish list’ with an emphasis on the importance of the mount over everything else. The importance of other beginner’s experiences have been a mainstay of the topics discussed as the same old problems come up again and again on the bulletin boards and forums where I am an active member. I have learnt much from and subsequently contributed much to the numerous astro-photography based topics on these forums and the answers to these same old problems are pretty much always the same – and those answers are all to be found in my book.

 To help with the ‘dark art’ of post processing, access to special pages on my regularly updated website is given where sample files can be downloaded to try out the procedures discussed in the text using both commercial and free software. A special links section on my website is also available to readers where a single click will take them to the websites mentioned in the book.

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There are not many book’s about aimed at Amateur Astronomers regarding learning the skills required to begin imaging Deep Space Objects, however things are about to change.

A friend of mine has just finished one that is entitled: Making every photon count a beginners guide to Deep Sky Astrophotography.

Expect it to available in the next month or so, More details to follow.

Small Prom.

SolarMax 60
sun2

Solar Imaging.

Solar Imaging.

Just getting to grips with the SolarMax 60

This is in Ser mode 16bit with the SkyNyx 2.0m

Looking forward to some good solar activity.

Kaguya captures Earth eclipsing the sun from Lunar orbit.

http://space.jaxa.jp/movie/20090218_kaguya_movie01_j.html

Astrofest.

Had an enjoyable day at Astrofest promoting Adur and Worthing Astronomical Societies, some interesting new equipment to be released soon from Meade and Skywatcher.

 

This is several 30 second exposures of M51 taken with a 20 inch Ritchey-Chrétien and a STL-11000M no darks or flats, hopefully a full report with several hours imaging time will follow.

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 Astro-Tech AT106 EDT Refractor.

Reviewed by Steve at http://www.nightskyimages.co.uk/

Specification
Supplier Altair Astro  http://altairastro.com/
Aperture 106mm
Focal Length 690mm
Focal Ratio F6.5
Primary Lens TMB Triplet design with one element made from Extra high Dispersion Japanese
Ohara FPL-53 glass with a collimatable lens cell
Focus Mechanism Dual speed Crayford with calibration marks on the focus tube. The whole focus
assembly can be rotated through 360°
Weight 6Kg
Length Dew Shield retracted 615mm
Dew Shield extended 698mm

I was asked to review this instrument from an astro-photographer’s viewpoint so I must confess from the start that no eyepieces were used during the process of this review.

On delivery, I found the telescope beautifully presented and protected in an aluminium flight case with an accurately cut foam lining that held the instrument very securely indeed. The black high gloss optical tube had a very good deep finish and the overall appearance oozed quality. Even the dust cap was finely crafted from aluminium and slid onto the end of the retractable dew shield comfortably but firmly.

The matching 114mm diameter tube rings were nicely produced in aluminium with substantial satin finished knobs for clamping the rings around the tube. The base and top of each tube ring had five standard camera mount threads (1/4”) in each surface for attachment to various types of dovetail bar or for the attachment of a piggy back guide ‘scope.

astrotech_refractor_side

Figure 1 – The view from the side with the dew shield retracted

On closer inspection, the multi-coating of the lens was clearly visible, indicated by the soft green hue and peering down the tube it was evident that good baffling had been incorporated into the design to aid contrast and there was even an internal baffle in the dew shield. The dew shield was retractable and could be locked in any position using a knurled thumb screw. The shield had an extension of 8.3 cm from fully retracted to fully extended. The movement of this was very smooth.

astrotech_refractor_front

Figure 2 – The view from the front with the dew shield retracted

The 2” focus tube with a single clamp bolt operating a brass collar also came with a 1.25” eyepiece adapter. The 2” eyepiece adapter held my Starlight Xpress SXVF M25C camera confidently and even with the weight of this and a 2” extension tube, once focussed, the assembly remained in place throughout my imaging sessions and there was no tendency for the focus tube to slide outwards thus destroying the focus.

The 10 to 1 reduction Crayford focus mechanism was a joy to use especially as I am used to a single speed Crayford on my own telescope. Total travel of the focus tube was 8cm and a convenient index scale graduated clearly in mm was etched into the top of the focus tube for quick setting up at the beginning of each session. As expected, with no diagonal in place, there was insufficient outward travel for use with my CCD camera so I used a 2” extension tube and achieved focus with the tube racked out to 6.8cm. A nice touch for the astro –photographer was the rotating body of the focus mechanism which allowed for the easy framing of objects.

astrotech_refractor_focus

Figure 3 – The 10 to 1 reduction Crayford focus mechanism

Although I received the telescope for review on 5th January, 2009 it wasn’t until 23rd January that conditions were suitable for imaging from my location but it was worth the wait as the image of the Rosette Nebula (see figure 4) that resulted from my first light with the instrument proved it to be a very capable imaging telescope. This image indicated that there was excellent correction for chromatic aberration and a pretty flat field (see figure 5) using my 23.4mm x 15.6mm CCD sensor which gave a field of view of 1° 56’ X 1° 17’. Considering the size of the sensor, I was pleasantly surprised by the lack of vignetting in the image.

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Figure 5 – The top right hand corner of the frame showing excellent flatness

In summary, I very much enjoyed my time with the Astro-Tech 106 and only wish that the sky conditions had been better to allow me to take more images with it. If you are considering the leap to a full triplet APO refractor for imaging purposes, this excellent instrument should definitely be on your short-list. I want one!

The weather has not been to kind the last couple of week’s but I managed to give the new Skynyx 2.0m it’s first light on Venus, the seeing was not very good so the results were quite poor unfortunately.

Steve managed to get out after 3 week’s to start the review of Astro-Tech’s AT106 EDT TMB Refractor, a full review will follow when completed.

Here is the Rosette Nebula 44×300 sec subs, nice work Steve.
rosette_230109_l

 

 

 

 

 

 

  

 

The New Year Social at Worthing Astronomical Society was well attended with over 40 members present.

There was a talk entitled:
The Incas: Sacred Landscapes & Sacred Skies by
Jane Russell BA MA, Archaeology South-East.

A buffet was laid on for the Members and it was good to see at the raffle Committee Members returning their winning tickets so that Members could win the prizes on offer.

So if your in the Worthing area and want to join a friendly well run Society pop down to the next meeting, more information is on the website:

http://www.worthing-astronomical-society.com/index.php

And don’t forget the astro-imaging competition that’s just been launched.

In association with BBC Sky At Night Magazine, the Royal Observatory Greenwich has just launched the Astronomy Photographer of the Year competition 2009, a global competition that aims to find the best astronomy pictures from around the world.

You can find out about the competition, read the rules and join up to submit your images at the competition’s website here:

http://www.nmm.ac.uk/visit/exhibitions/astronomy-photographer-of-the-year/

Or pop down to Adur Astronomical Societies http://www.adur-astronomical.com/  next meeting on the 2nd February.
You will get help from the best imagers in the County and expert advise from our Sponcer Modern Astronomy.

http://www.modernastronomy.com/

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