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Having had to move to an apartment where I could not use my CPC 1100, I decided that I have to see what I could do with my NexStar SLT 102 (alt-az achromatic 102mm f6.47 refractor). Setting up on my narrow balcony was challenging and the altitude bearing was so loose that it almost moved from the weight of the Canon 700D. I could not see M31 in the estimated 3.5 magnitude sky so I did a two star alignment and used the live-view to focus on a bright star. I then took a 15 second exposure after slewing to M31 which allowed me to see that I had it in the field of view. After a few more 15 second exposures and playing with the motion controls I managed to get it centered. The resulting picture is from 39 subs of 30 seconds at ISO 1600, 9 flats. The images were stacked and stretched with Siril and then I played with the curves on Gimp, cropped and scaled. Not too unhappy.
Note: This scope is in the USA, so international shipping may prohibit a sale. However, without the heavy Scopeguard case the shipping cost will be substantially reduced.
I can provide a full frame image taken with this scope if anyone is interested.
Reduced to £3155 for the complete package. I will consider offers, but this is already close to my bottom price.
I’ve decided to sell my Takahashi Epsilon Ɛ-180. The scope and optics are in good cosmetic and optical shape. There are a few minor tool marks around the collimation screws but otherwise no issues. The primary mirror is centered with a Catseye Hotspot.
The scope will come with the Takahashi corrector, rings and top plate ($457 add-on), front cover, Scopeguard case ($500 add-on), BT Technologies dovetail bar ($150 add-on) (has a blemish but is super solid), Astrozap dew shield and cap with focus mask ($175 ad-on), Precise Parts Tak corrector to M48 adapter ($110 add-on), the Takahashi collimation tools, an M68x1 male to M54x0.75 female and a M54x0.75 male to 2" compression ring adapter ($100? add-on) (these allow you to use the scope visually with 2" eyepieces.)
I replaced the stock focuser (included) with an Optec TCF-Leo focuser with temp probe. With the included scope adapter and Tak corrector adapter this is a $1400 add-on.
Total new cost = £5900
All of this for £3155 plus shipping.
Just thought i'll bring this up as a point of discussion. Today, cooled CMOS Astro Cameras are available in plenty. QHY, ZWO and other variants of the same camera are selling for very reasonable prices. However, there was a point of time when astrophotographers used to cool down their DSLR's as a cheap OSC alternative to CCD cameras. Give a choice, I would've purchased a dedicated CMOS OSC which can cool to 40 C below ambient, but since I had a Canon 500D which I had self modded, I requested a friend Kaustav Chatterjee (an avid model railroader) to cold mod my 500D (he had cold modded his 1000D long back). This newly modded camera has a TEC12703 single peltier and cools to approximately 20 below ambient.What do you guys think?
By lux eterna
This is 6 hours (30 x 12 min), taken with my modded Nikon D7000 @iso200 and Astronomik 12 nm Ha 2" filter on Meade LX200-ACF with reducer (=1600 mm FL @ F8). Guided with NexGuide on HEQ5 Pro.
The plan was to do a Ha O3 bicolour on this target, but the O3 may be a future thing due to weather conditions.
I usually remove the stars during part of my processing workflow and put them back later on, but this time I think the nebulosity and dust came out best without them. I did however try to find out which stars belong to Melotte 15 and include only those, just to portrait the Melotte 15 without anything between it and us, but I could not find that info.
Processed with DSS, Starnet and PS.