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5mm EP or 10mm + barlow

knobby

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knobby

knobby

Posted
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I'd appreciate your opinions on getting a 5mm ep or 10mm with my existing barlow...

I know my Hyperion covers this range but feel that to get down to 5mm equiv. its pushing the baader / barlow to its limits. In fact the edges go dark and its a bit tunnel like.

So ! what do you think would give the best viewing on those special nights when 240 x mag is useable ?

5mm ep or 10mm barlowed.

Looking at around £90 ish

Thanks for all your help peeps

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Mr Moff

Mr Moff

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I'm still only a beginner so don't have much experience yet but I would also go for a decent 5mm.

I've barlowed quite a few ep's recently with the tal and the SW,and each time I prefer the eyepiece on its own.

Danny.

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Mr Spock

Mr Spock

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A Barlow will give more eye relief as you are using a longer focal length eyepiece for the same magnification. However, with eyepieces around 32mm it can give tunnel vision due to eye relief being too long. A Barlow cannot inprove the field of view.

A best suggestion would be a 5mm Celestrol X-Cel LX at £69. Very sharp and contrasty, 60° fov and 16mm eye relief.

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AWR

AWR

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If you were considering a 5mm plossl then the eye-relief issue would be pertinent. With a £90 budget, however, you are looking at better eyepieces which will have good eye-relief anyway.

I quite like my TS planetary (although I've not tried shorter than my 9mm). I had a look through a 6mm WO SPL at SGL6 and I thought it was very nice. The Celestron X-Cels get a good review too.

Andrew

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LukeSkywatcher

LukeSkywatcher

Posted
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A Barlow will give more eye relief as you are using a longer focal length eyepiece for the same magnification. However, with eyepieces around 32mm it can give tunnel vision due to eye relief being too long. A Barlow cannot inprove the field of view.

A best suggestion would be a 5mm Celestrol X-Cel LX at £69. Very sharp and contrasty, 60° fov and 16mm eye relief.

I agree again.

I was gonna say that a good 5mm EP would cost about 60 quid. I bought a 4mm (yes really) Celestron Omni new for about 60 quid. Cant say i get to use it much. But when i do it gives killer views of the Moon. The eye relief isnt the best and the FOV is only 50 degrees but i can actually see through it.

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tjr

tjr

Posted
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+1 for single EP.

The X-cel range springs to mind... I think they are about the right price for you and offer decent eye relief at high magnification. I've not tried one myself but have heard good things.

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knobby

knobby

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Tried my BST Explorer 5mm for the first time tonight and it was spot on. For the money they're amazing quality. I was looking at the Celestron too but I decided to try the BST and don't regret it.

Cheers Chris

As you see in my signature I have a bst and I like mine too

suppose I need a BST 5mm vs Baader vs Celestron thread now

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gooseholla

gooseholla

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I have a 5mm hyperion - don't like it. Really hard to find the spot to look through. Much more impressed with my 5mm ortho - granted, less field of view, but the views are amazing - even better than the hyperion, and costs about half the price. Also get some quite nasty eye strain off the hyperion - it seems that you have to touch the glass to get a view (well for me anyway), even then it is a strain.

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Tribal-Wolf

Tribal-Wolf

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The way I figured it was that I probably would not get a huge amount of use out of a 5mm EP and so I went for the BST because it's a good price and a good EP, I too was going to buy a X-Cel LX and thought I would be better off trying the BST and I'm pleased I did.

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