Recently Browsing 0 members
No registered users viewing this page.
Hey guys it's me agaiinn. Recently I have been thinking about which telescope i should buy(its going to be my first telescope!!!!!) I have narrowed it down to 2 choices! The Skywatcher explorer 200p and the Skywatcher explorer 200pds
I just can't seem to chose oneee.
I want to do Astrophotography and i have heard that the Dual Speed focuser is going to help a lott. can someone please explain how? I m a total newbie and have just begun reading about Astrophotography.
On the other hand i ve heard that some eyepiece s will need an extension tube to help them achieve focus (due to the secondary mirror placed closer to the primary) and i really want to see through the telescope my self.I dont know if the extra 140€ that i have to pay to get the focuser and the pds and eq5 (rather than just getting the 200p and eq5 combined ) is worth it .Does it really make that big of a difference?? I hipe somebody can help me
Pickering’s Triangle (Seimis 3-188)
It is a little early in the season to be imaging this object as it didn’t appear above my local horizon until 00:50 when I started the project earlier this month but with nights getting shorter as we approach the summer solstice, it made sense to make an early start even though it took several nights to capture the data while ducking and diving between the clouds and early morning mist!
Pickering’s Triangle is part of the supernova remnant known as The Veil Nebula in Cygnus. The Veil Nebula itself was discovered by William Herschel in September, 1784 but this faint region was only later discovered photographically in 1904 by Williamina Fleming at the Harvard Observatory. The discovery was made post publication of the New General Catalogue (NGC) so it isn’t included in the catalogue. Although it wouldn’t happen today (I hope!), the custom of the time was to credit the discovery to the lead astronomer, in this case Edward Charles Pickering, the director of the observatory.
Mount: Mesu 200
Telescope: Sky-Watcher Esprit 150
Flattener: Sky-Watcher Esprit specific
Camera: QSI 683 WSG-8
Filter: Astrodon 3nm Ha and 3nm OIII
Subframes: 6 x 1800 sec Ha, 13 x 1800 sec OIII
Integration: 9.5 hours
Control: CCD Commander
Capture: MaxIm DL
Calibration, Stacking and Deconvolution: PixInsight
Post-Processing: PhotoShop PS3
The nebula can be found in the north-west quadrant of the Veil Nebula near NGC 6974 and 79 (see whole Veil Nebula image below). Lying around 1,400 light years away, the beautiful filamentary elements are the expanding shock-wave from the progenitor star that went supernova here somewhere between 5,000 and 10,000 years ago.
Position within the Veil Nebula
Visually, the nebula responds well to the use of an OIII filter as the region is rich in OIII emissions as can be seen in the blue/green filaments in the above images.
Photographically this is a wonderful object that responds well to both LRGB and narrowband imaging and the example shown here was captured using Ha and OIII filters. Although there are sulphur emissions (SII) in this region, this object responds well to my favourite imaging method of 'bi-colour’. This process uses just Ha and OIII filtration wherein the OIII data is mapped to both the ‘Green’ and ‘Blue’ channels and the Ha is mapped to the ‘Red’ channel. The greyscale images below show the individual Ha (left) and OIII (right) images used to produce this image. As you can see from the 'Stats' above, I have a whole load more Ha to collect to complete the image!
The individual Ha and OIII images
An absolute swine to capture with a full-spectrum camera full of pubes & no CLS filter, thus hoovers in Wakefield’s light pollution, hence this is a grayscale image (otherwise the entire thing is tinted in an unremovable orange that swamped out any natural colour). Only an hour of data... 15x 240s @ ISO800D, EOS1000D (modified), Explorer 200PDS