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I have been doing this for many years using a star adventurer with a canon 6d and different lenses upto 200mm from dark sky locations.
I wanted to get proper scope and EQ mount for a while but I didn’t think it was worth it shooting from the cloudy UK and I didn’t realise bortle 5 skies were good enough for it. After realising I was wrong I bought a HEQ5 and WO zs61. (I wanted a relatively small scope to begin with).
next thing I want to get is a dedicated astro camera. And of course going mono makes the most sense. Coming from a landscape photography world, bigger sensor is always better. However this is where I get lost a bit. According to the ccd calculator on astronomy tools website asi183mm pro is the best match for my scope (1.38 arc sec / pixel). Next option would be asi1600mm pro with a resolution of 2.18arc sec / pixel. However I’m slightly worried about this microlensing/reflection issue. Using a relatively wide scope, I may not be able to avoid bright stars all the time. And I know it would bug me if it happened.
i know zwo released new cameras recently but asi6200 is way out of my budget.
I can probably justify the cost of asi2600 (also 2.15 arc sec/pixel) . I know it’s an OSC and not mono, but the specs seem promising and I know few people mentioned the possibility of using this with narrowband filters. It’s still a relatively new camera so not a whole lot of information on it unfortunately but everyone who had one seems to like it. It would be interesting to compare this setup with a asi1600 for example.
- So is the asi183 really the best choice? Or slight under sampling is not an issue?
- asi1600 vs asi2600?
- I assume it’s still a big jump to go from a full frame dslr to a set point cooled OSC with a smaller sensor?
I've been less active lately in this hobby, but I've a few images done, others waiting in the pipeline to be processed.
This is a "crowded" area of our Milky Way galaxy, visible all summer from the northern hemisphere. The Cygnus constellation is home of many named and nameless nebulae.
Starting from the left (North), below the brightest star, Deneb, the Pelican and the North America Nebulae are very popular; going to right, just below the brightest star close to the center of the image, Sadr, lies the Gamma Cygni Nebula. A bit towards the top-right there's the Crescent Nebula and going forward top-right, there's the Tulip Nebula. Finally, at the bottom-right corner, the Veil Nebula, a super nova remnant.
All these are surrounded by shiny gaseous filaments or dusty patches blocking the light.
I started this during the pandemic lockdown. All of the data was captured from my hometown from a balcony brightly lit by a sodium street lamp, but the narrowband filters did their job well, blocking successfully the sodium emission.
A total of 23 hours is made of 2x3 panels composed in a larger mosaic, each panel consisting in about 1h of exposure for the red Hydrogen and 3h of exposure for the cyan Oxigen, all through a Sigma 105 macro stopped at F/4, ASI1600MMC with 6nm Astronomik filters.
I'm planning to shoot RGB data too and make an RGB/HOO composition.
Cheers and clear skies!
astrobin link: https://www.astrobin.com/r22yre/
flickr link: https://www.flickr.com/photos/170274755@N05/49939128338/
*£1300 including recorded delivery to the UK; or £1250 if you can collect from central Bristol.*
Hi all, I’m looking to sell my ZWO ASI1600MM-Cool plus accessories as a bundle. I’ve had a great time with this camera, but now have a baby daughter that is leaving me zero time for astro imaging! So I’m parking the hobby for a few years… but I’ll be back!
A lot’s been written about how good this camera is so I won’t reiterate all that, except to say that I’ve had a lot of success coupling it to my ED-80 ‘scope and HEQ5 mount. I image from central Bristol and the light pollution is horrendous, but this camera and the narrowband filters bypass that problem rather neatly. Here are photos I’ve taken with the camera:
The core kit I have is basically this: https://www.firstlightoptics.com/zwo-cameras/zwo-asi1600mm-pro-usb-3-mono-camera-efw8-125-lrgb-filters-125-ha-sii-oiii-filters-bundle.html
Note the link is for the “Pro” version, which is slightly different to my one in two ways. One, the Pro has an in-built heater for the sensor. I bought one separately for mine, which of course I’ll include. (https://www.firstlightoptics.com/zwo-accessories/zwo-anti-dew-heater-strip-for-asi-cooled-cameras.html). Two, the Pro has a larger memory buffer, but I never found the lack of this to be an issue with my usage.
Also included is a slightly different version of this holder ring.
And an adapter so you can attach Nikon F lenses.
And this very useful cable!
I've taken plenty of photos so you can see exactly what you'd get. First, here's the back of the camera:
And the front, showing the sensor and heater:
This is one side of the Electronic Focus Wheel. All seven filters are mounted:
And the other side:
Here's the Nikon lens adapter:
And the camera holder:
These are the cables it comes with. On the left we have the Lynx Astro cable, with a dual-tip; one for the camera, the other for the heater. Then we have the EFW cable, and blue cable for camera to computer -- both of which are originals. The blue cable is annoyingly short, so I'll throw in a longer one too.
Here's the EFW box and included accessories:
And finally, the camera box and included accessories:
Approx. price breakdown if bought new:
Camera and filters bundle: £1716
Holder ring: £49
Nikon lens adapter: £45
Lynx Astro Silicone Power Cable: £19
I’m asking for £1300 including recorded delivery to the UK; or £1250 if you can collect from central Bristol. Payment via PayPal or bank transfer. If it doesn't sell after a few weeks then I'll consider offers or splitting the kit.
The Wizard Nebula
An emission nebula 7,200 light years away and my first proper project of the new imaging year.
Really happy with it as I’ve had a steep learning curve with new kit so really pleased to see this image come together. It’s also the first time I’ve imaged it.
72x180s subs collected over 2 nights 24/25th August in my Bortle 7 back garden, Whitley Bay, England
Calibrated with darks, flats and dark flats in DSS and processed in SiriL and Photoshop.
Lacerta 72mm f/6 APO
ZWO ASI1600MC Pro at -15C gain 200
ZWO 60mm guide scope
ZWO ASI120MM-S guide camera
Altair Astro 2” Tri Band OSC Filter
Data collected in APT and guided with PHD2
This has been on my hard drive for some months, so nice to have finally got round to processing it! Shot over several nights in January in my back garden.
NGC 281, also known casually as the Pacman Nebula, is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way's Perseus Spiral Arm. It lies about 9,500 light years from us and is 48 light years across.
As the final version, I've gone for a crop, which I think holds up well, though I'll include the wider fov version in the next post.
I used a more natural colour blend for this image:
R = 76%*Ha + 24%*SII
G = 100%*OIII
B = 85%*OIII + 15%*Ha
For some reason, I was not expecting much from this image, but the result looks like it will be one of my favourites...the narrowband data was really good!
Captured using APT, stacked using APP and processed in Pixinsight.
5.4 hours integration time.
Link to full details and higher res version.
Thanks for looking!