Bushnell Spacemaster (1 Viewer)

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Bencw

Well-known member

• Dec 18, 2015

• #1

I bought this Bushnell spacemaster scope on a whim. It was not a lot of money and looked unused so thought I would take a punt. I know there are several spacemaster models, and wonder which model and where this one fits in the hierachy? The 20 - 60x zoom eyepiece can be moved to varying positions, it's not bad, the view at 20x to 30x is decent but above that it is not so good, possibly a different eyepiece may be better if any fit ?. I don't know much about scopes, so not sure how these compare, but would say my very old Optolyth seems sharper.

 

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Bencw

Well-known member

• Dec 21, 2015

• #2

This seems to have an internal thread of app 28mm, I am thinking of trying a 28mm to 37mm step up ring to use my fixed 30x Optolyth eyepiece on this scope, would that work does anyone know? My scope knowledge is zilch.

 

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jring

Well-known member

• Dec 22, 2015

• #3

Hi,

I'd be astonished if that works. Is the optolyth EP slim enough to fit more or less flush into the body? If yes, it might work - if not, probably don't bother.

It's not only a mechanics thing, even if it fits, you might not be able to focus to infinity and if the EP stands out a lot chances are not so good.

Regards,

Joachim

 

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Bencw

Well-known member

• Dec 22, 2015

• #4

Thanks Joachim, the EP would not fit flush, only a small portion of thread would go into the ring, so probably a non starter, although a step up ring would cost next to nothing, seems not worth the bother. I think I may sell this scope soon, I only bought out of curiosity and as it was cheap.

 

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Bencw

Well-known member

• Dec 23, 2015

• #5

jring said:

Hi,

I'd be astonished if that works. Is the optolyth EP slim enough to fit more or less flush into the body? If yes, it might work - if not, probably don't bother.
It's not only a mechanics thing, even if it fits, you might not be able to focus to infinity and if the EP stands out a lot chances are not so good.

Regards,

Joachim

Click to expand...

Joachim, I just had to try out of curiosity. You were quite right, the 30x EP would not focus, however, I tried the same thing with my 20x Optolyth eyepiece and first impression is that has worked much better, nice image.

 

J

jring

Well-known member

• Dec 23, 2015

• #6

Congratulations - one out of two is not too bad. What is the magnification and field of view with the 20x Optolyth as compared to the zoom?

Joachim

 

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Bencw

Well-known member

• Dec 27, 2015

• #7

jring said:

Congratulations - one out of two is not too bad. What is the magnification and field of view with the 20x Optolyth as compared to the zoom?

Joachim

Click to expand...

20x fixed Optlyth compared with the Bushnell zoom at 20x, about the same, but the Optolyth is marginally sharper, the FOV appears slightly wider with the Optolyth EP, but not much in it.