Probablynot Posted March 6, 2012 Share Posted March 6, 2012 ... has the black plastic cover that covers the open end of my SW150P got two holes in it, each of which has its own special little black plastic cover? Link to comment Share on other sites More sharing options...
spaceboy Posted March 6, 2012 Share Posted March 6, 2012 For stopping down the aperture while observing the moon. Take the cap of the one and place it on the other (holder) Link to comment Share on other sites More sharing options...
LukeSkywatcher Posted March 6, 2012 Share Posted March 6, 2012 The BIG one is the full aperture of the scope. Take it off. The smaller one was originally to observe the sun (with a filter). It cuts down the aperture of the scope. Link to comment Share on other sites More sharing options...
JamesF Posted March 6, 2012 Share Posted March 6, 2012 You lot, you're such teases.Ignore them, Brian. They're actually cupholders for your tea/coffee/hot chocolate on those long freezing cold winter observing sessions.James Link to comment Share on other sites More sharing options...
Probablynot Posted March 6, 2012 Author Share Posted March 6, 2012 Ah. Your replies all make sense. Sort of. Link to comment Share on other sites More sharing options...
barkis Posted March 6, 2012 Share Posted March 6, 2012 I think when the large cover is left on the scope, and the two small ones are removed, it aids focusing. When you come to focus on a star for example, you will initially see two images, true focus is acheved when the two stars merge into one in your eyepiece.Ron. Link to comment Share on other sites More sharing options...
kenmyers Posted March 7, 2012 Share Posted March 7, 2012 The small hole is to reduce aperture. Litterally to make your scope 'smaller'. Link to comment Share on other sites More sharing options...
ollypenrice Posted March 7, 2012 Share Posted March 7, 2012 Don't use the one for the sun with a rear filter of any kind. They are very dangerous. Only ever use a high grade FRONT solar filter and/or use the projection method.Olly Link to comment Share on other sites More sharing options...
scuffer Posted March 7, 2012 Share Posted March 7, 2012 Another thing learnt , I wondered why they were there but never thought to question why ? Link to comment Share on other sites More sharing options...
Mike73 Posted March 7, 2012 Share Posted March 7, 2012 You lot, you're such teases.Ignore them, Brian. They're actually cupholders for your tea/coffee/hot chocolate on those long freezing cold winter observing sessions.JamesI use mine to hold a 1 million candle power torch, its great, no more tripping over things in the dark but haven't seen any stars in ages! Link to comment Share on other sites More sharing options...
Pappy Nick Posted March 7, 2012 Share Posted March 7, 2012 Consider yourself lucky !!!My Heritage 130p only came with the one big cap. I was most put out !!! Link to comment Share on other sites More sharing options...
JamesF Posted March 7, 2012 Share Posted March 7, 2012 That's because with the Heritage 130P it's best used stood on a table, so you've already got somewhere to put one of your coffees.James Link to comment Share on other sites More sharing options...
Probablynot Posted March 7, 2012 Author Share Posted March 7, 2012 When you come to focus on a star for example, you will initially see two images, true focus is acheved when the two stars merge into one in your eyepiece.Ron.Cool! All very Quantum! Link to comment Share on other sites More sharing options...
knobby Posted March 7, 2012 Share Posted March 7, 2012 If you take one of the caps off it lets you hang the cover on the carry handle of a Skywatcher dob ... Link to comment Share on other sites More sharing options...
Frank the Troll Posted March 8, 2012 Share Posted March 8, 2012 The small hole is probably an arperture stop used for visual equalision for viewing planets, and best used with a 32mm EP, or possibly a 25mm Link to comment Share on other sites More sharing options...
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