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Equipment Discussions >> Eyepieces

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ibase
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Reged: 03/20/08

Loc: Manila, Philippines 121*E 14*N
Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: gregory93]
      #5545211 - 11/29/12 10:03 AM

Quote:

Excellent Hernando!!
Well done!




Thanks much for your kind words dear sir!

Best


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weinerat
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Reged: 12/30/09

Loc: Dalian China
Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5546390 - 11/29/12 10:43 PM

Quote:

I just use mine in 1.25, but it's hard to reach focus, that's why I have a recessed adapt., with a standard 1.25 adapt. can't reach focus. this is a problem on my little 3" refractor, which needs much higher magnification.

Bill




Bill can you explain this more since I tried mine with a barlow and had the same problem (needed a slightly shorter barlow to enable my telescope to focus). Wasn't sure if I just needed a different barlow or something else.


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Bill Cowles
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Loc: Utah
Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: weinerat]
      #5547201 - 11/30/12 01:11 PM

If you look at my image, you can see that barlow sits lower, because I used a 1.25 adaptor that had a side cut for the locking screw. Most 1.25 adaptors sit higher and have the locking screw in the side. This seems to be a common problem when using this barlow at least when I'm using mine on my Lunt Solar wedge. I think the Locking ring adaptor in the previous post could help.

Bill


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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5549262 - 12/01/12 07:07 PM

EDIT: A 2" adapter is not really necessary when going for the 2" format w/ the Baader 2.25x barlow, just use the zoom's 2" sleeve:


Left: 2.25x barlow in 1-1/4"; Right: barlow in 2" format

Best,


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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5549554 - 12/01/12 11:21 PM

Using the Hyperion zoom in my refractor scopes posed no in-focus problems (more so on my SCT & Mak), like with the William Optics Megrez 102ED scope shown below:


Hyperion zoom on a WO Megrez 102ED refractor

Or with my Antares 6" refractor:


Hyperion zoom on the Antares 1529 152mm refractor

Or the Orion ST80:


Top: Orion ST80; Bottom: William Optics 66mm petzval

But the WO 66 ED refractor shown above (my RDS - Rapid Deployment Scope for quick looks & favorite for lunar photos w/the Hyperion zoom) was a bit finicky and wouldn't come to focus with the zoom using an OPT diagonal (which came with the scope when I purchased it used in immaculate condition in its WO soft-case and a WO 188 tripod all for $290). It required more in-focus racking.

The good thing was that the OPT 2" diagonal's EP-side lip can be unscrewed:


OPT 99% dielectric 2" diagonal lip (EP side w/Hyperion 21mm)

So I had a substiture aluminum low-profile lip custom machined to screw-in to the diagonal, replacing the original EP-lip, and that solved the problem by moving the light path closer to the EP; the Hyperion zoom now works glitch-free focusing on the WO66mm . There are also off-the-shelf low profile adapters available as have been discussed in other threads on here.


2" OPT diagonal w/custom made EP-side upper lip


Hyperion zoom on a custom-made 2" low-profile adapter on the WO66mm Zenithstar refractor

The WO66ED/BHzoom duo is my favorite afocal astrophotography gear for Moon shots.

Best,


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Bill Cowles
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: ibase]
      #5550193 - 12/02/12 11:39 AM Attachment (6 downloads)

My focusing problems might because I mainly use the barlow with my Lunt Solar wedge and it does extend the position of eyepieces.

Bill


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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5550210 - 12/02/12 11:49 AM

Bill, have you tried the BH zoom/barlow in your Lunt Solar scope in the zoom's 2" configuration?



Best,


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Bill Cowles
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: ibase]
      #5550358 - 12/02/12 01:35 PM Attachment (9 downloads)

No, always use the 1.25 nose piece and the don't use the barlow often with the Lunt as the power is usually too much for Ha viewing, image is just too dim. I always use the barlow with the wedge, as white light viewing can take high power and still be bright and sharp.

Bill


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ibase
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5550859 - 12/02/12 07:10 PM

Thanks, that's good to know. Visually, from the pics posted, it just seemed as if using the 2" sleeve of the zoom w/barlow will make it protrude less on the Herschel wedge, bring it closer to the light path, and possibly do away with the need to use a low-profile 2"-1.25" adapter.

Best,


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Bill Cowles
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: ibase]
      #5552154 - 12/03/12 02:29 PM

I can't remember if I ever tried that, once the clouds leave and the Sun sees some more action, will try.

Bill


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ibase
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5552530 - 12/03/12 06:15 PM

Thanks, looking forward to the findings; pretty clouded out here too; clear skies!

Best,


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Bill Cowles
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: weinerat]
      #5564322 - 12/10/12 02:59 PM Attachment (7 downloads)

This is the adaptor that I used to reach focus. The GSO 2" balow has a slot for the locking screw, so the 2" to 1.25" adaptor sits lower than a barlow without this slot. My TV 2" barlow also has a slot so it seems most 2" barrows have this slot for the adaptor. It allow for a lens to sit around 1/2 " or so, lower and in my case it allowed for focus. The top of the adaptor is slightly recessed instead of an extension with a locking screw.

Bill

Edited by Bill Cowles (12/10/12 03:01 PM)


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Bill Cowles
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5564343 - 12/10/12 03:06 PM Attachment (7 downloads)

I forgot to mention I remove the locking screw or it would not sit low enough. Since I'm using this with a Solar wedge, I need to rotate the lens for brightness control, so don't need the locking screw.

Bill

Edited by Bill Cowles (12/10/12 03:10 PM)


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ibase
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5564789 - 12/10/12 07:56 PM

All good info, thanks for posting!

Best,


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weinerat
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: Bill Cowles]
      #5565163 - 12/10/12 11:51 PM

For those of you with the 2.25x barlow, I'm curious about the focusing issue (i sent this not to Bill, but now am asking others). I have the 8-24 mark 3 that I've used almost exclusively on my 12" dob, but earlier this year I moved to china for a couple years and didn't want to bring the dob, so I bought a 3" table top refractor (cheap, but easy to use for planets, doubles, moon, sun). It has a very short focal length (350 mm), so with the zoom at 8 mm, I still only get 43x power. I bought an OWL 3x barlow for it, but when I add the two, I can't focus (I need the combination to sit a little deeper in the focuser, it is just out of reach, which is why I asked the question about the recessed adapter).

So this is why I'm curious. One option is I can buy the 2.25 Baader zoom and see if that solves my problem (and then I have a usable zoom when I go home for my dob or an upgraded refractor), but I would hate to do that and find out that I have the same problem. My other option is just to buy a "cheap" 3.2mm ortho for the scope.

So for those of you using the baader barlow, are you having issues with focusing in certain scopes?


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ibase
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: weinerat]
      #5565347 - 12/11/12 02:36 AM

Quote:

For those of you with the 2.25x barlow, I'm curious about the focusing issue (i sent this not to Bill, but now am asking others). I have the 8-24 mark 3 that I've used almost exclusively on my 12" dob, but earlier this year I moved to china for a couple years and didn't want to bring the dob, so I bought a 3" table top refractor (cheap, but easy to use for planets, doubles, moon, sun). It has a very short focal length (350 mm), so with the zoom at 8 mm, I still only get 43x power. I bought an OWL 3x barlow for it, but when I add the two, I can't focus (I need the combination to sit a little deeper in the focuser, it is just out of reach, which is why I asked the question about the recessed adapter).

So this is why I'm curious. One option is I can buy the 2.25 Baader zoom and see if that solves my problem (and then I have a usable zoom when I go home for my dob or an upgraded refractor), but I would hate to do that and find out that I have the same problem. My other option is just to buy a "cheap" 3.2mm ortho for the scope.

So for those of you using the baader barlow, are you having issues with focusing in certain scopes?




Hi,

If you haven't already tried it, see if this will work. Your Owl 3x barlow has a barlow element at its bottom that can be unscrewed, just like in the pic below:


Barlow elements unscrewed: Top - GSO type 2" 2x barlow; Bottom - Celestron EP kit/Omni 1-1/4" 2x barlow

Remove the barlow element & screw it unto the 1-1/4" filter thread of the BH zoom. The effective power in that case would be around 1.8x instead of 3x. See if it will focus in your 3" refractor.

With regards to the Baader 2.25x barlow, I tried it with my 2.5" refractor (388mm focal length) upon reading your post. Using a standard 2" OPT diagonal with no modifications, the scope will not focus with the BH zoom (required just a little bit more in-focus racking to be able to focus). Same thing when I used a TV 3x barlow with the zoom (required even more in-focus racking than the zoom alone). But when I screwed on the Baader 2.25x barlow onto the zoom, the scope came into focus.

Hope this helps.

Best,


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weinerat
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: ibase]
      #5565658 - 12/11/12 10:14 AM

Gave the unscrewing a try. The leftover element wasnt long enough to screw into the BH zoom.

So herando, what you are saying with the second part of your post is that the zoom didn't work when you slipped it onto either Barlow but did work hen you screwed it onto the 2.25 BH Barlow.


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ibase
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: weinerat]
      #5565785 - 12/11/12 11:43 AM

Sorry if it wasn't so clear, it's the part of the barlow with the lens that gets to be screwed unto the 1-1/4" filter thread of the zoom, like this:


BH zoom w/ lens-part barlow element at right

Yes, you're right about the second part:

2.5" Refractor + BH zoom = no focus
2.5" Refractor + BH zoom + 3x barlow = no focus
2.5" Refractor + BH zoom + Baader 2.25x barlow = FOCUS

EDIT: Note that in tests above, the scope +BH zoom only was very near in getting into focus; that said, I doubt if adding the Baader 2.25x barlow would fix the focus problem if the zoom only in the scope was really far off from focusing; also, test conducted was for terrestrial objects only.

But with my other refractors - 3", 4", & 6", there's no focusing problem, it's only with the small WO66mm that's finicky about focusing with the zoom.

Best,

Edited by ibase (12/11/12 11:31 PM)


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weinerat
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: ibase]
      #5567138 - 12/12/12 08:40 AM

your picture helps, but neither of my barlow elements fit into the 11/4 adapter of my BH zoom. It would be the same as screwing in a filter, but it is too wide.

I'm surprised your refractor wouldn't focus with the BH zoom. mine is just fine. it's only with the barlow that it just misses


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ibase
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Re: Baader Hyperion 8-24mm zoom - 1-1/4 inch nosepiece new [Re: weinerat]
      #5567378 - 12/12/12 11:30 AM

In that case, the 2.25x Baader barlow will work with your Mark III zoom & refractor because using the barlow with the zoom will require a little out-focus racking than just the zoom itself.

Wondering why the barlow element in your Owl 3x barlow won't fit the filter thread of the zoom because I've read in the Owl website here that "Lens cell screws onto the bottom of the eyepiece filter thread." Am assuming it's a 1-1/4" barlow, or do you have a 2" barlow?

Yes, my small WO66mm petzval refractor that came with a 2" OPT diagonal won't focus with the zoom that's why I had to have a 2" low-profile adapter fabricated:



But it's worth the trouble just so that the BH zoom will work with the scope.

Best,


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