Arriving tomorrow from my favourite astronomical retailer Widescreen Centre https://www.widescreen-centre.co.uk/
Should be my new ZWO 7 position filter wheel, this is the new mk2 version that is slightly larger than the mark 1 and better compatibility with the newer ZWO cameras.
No off axis guider used on my system so I will follow the set up here to create the correct 55mm back focus,Along side it will be the 36mm unmounted LRGB from ZWO and 6nm narrow band filter sets from Optolong. I was incredibly impressed by Optolong's L-enhance tri band & L pro filter light pollution filter. Many images of their use can be seen in the previous posts. Unmounted filters will require fitting rather than them having a screw thread. 36mm are needed for the APS-C chip on the camera to avoid the vignette.
The Optolong 6.5nm SHO narrowband filters set is for astrophotographers who want to obtain the maximum contrast of nebulae while cutting out background emission and suppressing star lights. This filter set includes a 7nm hydrogen-alpha filter and 6.5nm sulphur-II & oxygen-III filters.These filters cover the major emission lines of emission type nebulae. These filters are also commonly used by astrophotographers to present their photos in Hubble Pallete. I cannot wait to capture some starlight. I will wait and see what arrives tomorrow.
Update:19/8/21 Well everything has arrived and I have now inserted the filters into their new home, installed and rebalanced scope. Just need a few clear skies.
22/8/21 Aghhhhh was promised a clear sky last night albeit with the full moon, but alas clouded out.
23/8/21 For about an hour and a half tonight despite a near full moon I managed to find focus for each filter and they all focus within 10 clicks of each other happy with that for par focal.
I couldn't resist running a very basic stretch on this before bed now at 1.20am.
So 12 x 5 minute exposures with the Ha filter.
Images used from ZWO and Optolong websites.
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