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Posts posted by awlfc

  1. 21 hours ago, Vondragonnoggin said:

    Some places in Texas still have dark skies but the big cities in Texas are no different from light polluted big cities everywhere. Since you have a 2x barlow already and the very nice 25mm Plossl, you are getting a 12.5mm equivalent when using the 25mm in the barlow. You might try an eyepiece in the 14-17mm range. Barlowed would give 7-8.5mm equivalent with more eye relief than the current 10mm Plossl. I find the Skywatcher 10mm is a good eyepiece but do not like the short eye relief and prefer larger eye lens with longer eye relief. Barlows increase eye relief unless they are telecentric design power amplifiers (focal extenders). A good 17mm is a nice jump down from 25mm and should have adequate eye relief as well. For a next jump in magnification, an 11mm would be good. In a barlow it would be a 5.5mm equivalent.


    Three eyepieces and a barlow giving you 25mm, 17mm, 12.5mm, 11mm, 8.5mm, 5.5mm magnifications. Plus your 10mm as well and 5mm with the 10mm in a barlow.

    if the barlow has the lens element that unscrews and can be screwed directly on the bottom of an eyepiece barrel, it will give 1.5x amplification.  So you have magnifications for the following focal lengths - 25, 17, 16.6, 12.5, 11.3, 11, 10, 8.5, 7.3, 6.6, 5.5, 5 millimeters

    All out of 4 eyepieces (25, 17, 11, 10) and a 2x barlow 


    Another option would be to get a Televue 2.5x Powermate. Three eyepieces (25mm, 17mm, 11mm), a 2x standard barlow with lens element that can be screwed directly on the eyepiece for 1.5x, and a 2.5x Powermate will give you a very large number of magnifications. Focal lengths of 25, 17, 16.6, 12.5, 11.3, 11, 10, 8.5, 7.3, 6.8, 5.5, 4.4 millimeters.

    All those and you never have to use the Skywatcher 10mm Plossl to get any of that. You can tuck it away in a drawer.

    Ive copied and paste that into my notes. I'll start buying a few extras each pay day.


    Last night it all come together and had some amazing views of Jupiter I could see the colour and band across it. My views of the moon blew me away. Just randomly pointing the scope around the sky and seeing thousands of stars. 

  2. First night out with my score last night. Decent breaks in the clouds and with the 10mm eyepiece that come with the scope I could see and find everything I pointed it at. But when i put my BST lenses in all i could see was my eye lashes. What am I doing wrong and why is the twist thing on the BST an extra focuser 

  3. 7 hours ago, Louis D said:

    A custom 8" Dob, a custom 15" truss Dob, an AT72ED, a 127 Synta Mak (Orion, I think), an ST80, and a PICO-6.  I'd like to get a 120mm to 150mm ED refractor next (preferably with an FPL53 doublet).

    That's some collection. Where in the world are you from. 

    Ive only just got my first scope been using 20x80 celestron binoculars for about 6 months  csnt wait to get my scope out ots been cloudy since I got it. I now have 2 BST lenses 8 and 12 plus the 10 and 25.. I got with it plus a x2 Barlow  that should keep me going for a while. My next purchase later on in the year will be an EQ mount 

  4. Think I'll go with the 8 now and get the 12 next pay day. Do you all stick with the same type of eyepiece or do you mix and match with different makes. Just seen skywatcher planetary eyepieces and they are about £10 cheaper than BST. This is a complicated hobby to start off in. 

  5. I have just recieved my scope and I have the standard 10 and 25mm eyepieces that come with it and a 2x Barlow. I am looking at getting an 8mm BST eyepiece I was wandering if this will be a good match for the scope and work well with the Barlow. I have read so much about focul length and scope speed I have over loaded my head and I'm more confused than before I started to read. 

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