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Thread: just a quick q

  1. #1
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    Default just a quick q



    I couldn't find a spotting scope forum bit so thought this might be close

    I have at the moment a pair of Celestron up close 20 x 50 fov 3.2
    I do like them and can see quite a bit, but I was going to add to my collection (I also have a Celestron 114mm reflector) but wanted to know if they were worth buying

    here is what I was going to get

    Bresser Spotting Scope
    Ideal for all types of outdoor, nature and wildlife viewing activities including bird watching
    Magnification: 20x - 60x
    Field of view at 20x: 29m/1000m
    Rotates through 360°
    Includes table tripod, pull-out sunshade, protective dust cap and soft case with carry strap
    5 year manufacturer’s warranty


    I just wanted to know what kind of things I would see from it would it be like my bino's? I can see jupiter with my bino's with his moons, obv not as clear as I see through the 114mm but I can still see him

    also would it be OK for someone who wants to start star gazing? (I bought him a star map booklet thing to get him going but his girlfriend noticed me looking at the scopes and was thinking of getting him one also .................. has anyone used a spotting scope ? how good will this one be? its about £45/£50 I think

  2. #2
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    Default

    Hello Space Lady !

    I've never owned a spotting scope, but my understanding is that they are intended for daylight terrestrial observation, and not for astronomical use. Their lens coatings will possibly be prepared for reducing the amount of daylight passing through and can be playing against you when looking at night skies. So, be careful.

    As I said, I never owned one and was not interested before, so the above are just my two cents about it. I will leave the experts to jump in and provide better advice

    Clear skies

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    Default

    well I never thought twice about spotters until I started to think that maybe it was easier to look through as sometimes when I look through my bino's I shut one eye lol not sure why I just do maybe its because it can get confusing when I see two circles its like I see double I thought a spotter would b similar (looking through bino's with one eye)

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    Default

    Ah! That's a different story !

    If you see double with your binos, you need to fine adjust the interpupilar distance. Read the instructions to know exactly how, but there's normally a small adjustment screw or knob near the focusing wheel.

    Hoping to have helped

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    Default

    I mean double as in two circles when I look through them I see 2 circles I think thats just how bino'a work (with my eyes)

    eg. If I look at Pleiades through bino's I see it in my left eye (left circle) and also see one in the right eye (right circle) I dont see double through one circle , ohhhh it's really hard to explain

    erm like 2 cups around eyes but both looking at same thing so from the gap in middle it makes me see two thats why I shut one eye so I just see one image

    I just assumed my eyes can't look though bino's (both eyes) so I just use one

    will that above sort that out or is it just to focus it?

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    Default

    I just tried to get a image of what I see and this is what I found lol

    what I see is like the wrong picture but more as single circles just joining in middle

    Interpupillary Distance - by Michael and Diane Porter

    thanks for your help I will try and alter them (haha feel stupid for using them for so long n not known haha) mind you all bino's I've looked though have always done this so I assumed my eyes can't look through them haha dohh)

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    Default

    just tried, they don't bend down enough so I will never see 1 circle will I ?

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    Default

    hmmmm... that's strange

    Could it be a diopter adjustment issue ?

    As your eyes will not have exactly the same sharpness, there's a way to adjust for it and to be able to focus both eyes :

    Binocular Tuneup - The Diopter Adjustment

    Give it a try and good luck !

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    Default

    they are clear when I look through it's just that it I see two circles

    my eyes musn't be in the right place to look through bino's I tried pushing them right onto my eyes but it just hurt lol

    I really don't get it lol can some people look through them and others can't?

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    Default

    Hi Space Lady,

    To me with your binoculars, this sounds like either a collimation issue, or a problem with close-focusing - but, you said this happens when you are viewing the Pleiades. So I would chalk it up to poor collimation (both barrels are not seeing the same field of view). This happens too when you try to look at something that is too close for the binocular - the overlap of the view between the two barrels becomes less and less the closer the object is.

    In terms of spotting scopes, you typically get less aperture (the size of the primary mirror or lens which affects how much you can see and brightness) compared to a similar quality telescope. More glass surfaces are needed in the spotting scope to make the image oriented in the proper way - which is necessary for daytime use and costs more than less glass (if done properly). As JuanM has said, this will contribute to how much light can pass through and make the image dimmer. A properly functioning 20x50 binocular will see just as much as a 20-60x60 spotting scope set at a 20x magnification (as viewing the night sky). The increase in magnification the spotting scope offers may be nice for the planets though as they are relatively bright, but not much else. Also, many entry-level spotting scopes are subject to 'tunnel vision' - the field of view can be so small at some magnifications it feel like you are looking through a straw.

    Of course, I am biased, and I would stick with binoculars for a wide field of view and the comfort of using both eyes (provided they don't give double images!)

    Have fun!

    Jeff

    P.S. The best way to check your binocular is have someone else try them (specifically someone with eyes set further apart). If they can't adjust them so that they see only one circle, than you can be pretty sure it is a collimation problem. If they can see only one circle, than the IPD adjustment most likely doesn't go small enough for your eyes.

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