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Denk Standard eyepiece advice w/ Nexstar 8SE

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#1 Buonarroti

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Posted 06 May 2013 - 08:14 PM

Thinking of the Hyperion 8-24 zoom w/my Denk Std. My diagonal is a Celestron 2" XLT. The 8SE is arriving first week of June so I have more than enough time to make a decision. Pro/con on this setup & would be interested in hearing from anyone with a Denk Std & 8SE.
Thanking all in advance...

#2 johnnyha

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Posted 06 May 2013 - 10:54 PM

A big con would be the extreme weight and length from such a setup.

#3 REC

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Posted 07 May 2013 - 07:21 AM

I would stay away from that big zoom x2 in the BV with a single fork scope. Lightweight plossls are a good choice or SWA's in the 20mm range.

I use 16mm, 20 and 25mm pairs in my BV scope with single arm.

Have fun, as they are a blast to use.

Bob

#4 Buonarroti

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Posted 07 May 2013 - 08:22 AM

johnnyha/REC...being a newbie to Binos, am I limited to eyepieces with a max.
AFOV of 68 degrees..Any other limitations I should be aware of....

#5 REC

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Posted 07 May 2013 - 09:29 AM

One thing to be aware of is the back-end configuration of your scope. I have been told by BV expert, (Eddgie)that adding the 2" diagonal back and the BV lightpath your scope is now operating about f/2500 and about f/13 instead of f/10.

This means that a 20mm EP is no longer at 100x but more like 125x. A 24mm 68* would lose some light. Better off sticking with a 20mm SWA if that is the FOV you like. Plossl's are 52*

#6 Starman81

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Posted 07 May 2013 - 09:41 AM

I have the 8SE with the Denk IIs, which are quite similar and I use some smaller eyepieces for Binoviewing, with good results: TeleVue Plossl 32mm's, Edmund Ploss 28mm's and Pentax XW 20s. A pair of Baader Zooms would be tough to get the nose clearance as those are quite wide eyepieces and the FOV is constricted at the longer focal lengths. So you would be relegated to higher power views only.

The TeleVue Plossls vignette, meaning the edges are not fully illuminated, which can affect the aesthetic quality of the view. I will probably not keep the bino pair, but instead keep one for monoviewing.

The Edmund Plossls and the XW 20s provide the same FOV but the XWs provide more magnification. The XWs are expensive though. The Edmund Plossls are great, nice and light and easy on the wallet. I tried RKE 28's, but the view was tough to hold.

That is all the experience I have with binopairs so far. The limitation you have is that if the field stop of the eyepieces you use exceeds the clear aperture of your binoviewer, you may see the vignetting I was referring to earlier.

#7 Buonarroti

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Posted 07 May 2013 - 11:00 AM

Thanks everyone...so would I be OK with something like the Explore Scientific 82* eyepieces? They run from 4mm up to 24mm and r in my price range.

#8 REC

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Posted 07 May 2013 - 01:08 PM

Probably want the SWA 68* version, 20 and 16mm at $100 each or look at Willimas Optics 20mm SWA, very lightweight.....or, just a good set of plossls for $30-40ea.

Check on our hosts website for a nice selection of EP's and good pricing with a members discount.

#9 johnnyha

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Posted 07 May 2013 - 01:22 PM

The 24mm 82* is probably 2", you need to stick to 1.25" eyepieces. A 24mm 68* will vignette in those binos you should probably stick to 20mm or less in 68*. The 20mm ES 68* is a good choice (or 19mm Panoptics). The 16mm ES 68* is really nice but has very little eye relief, on mine my eyelashes would occasionally brush the housing. I like Plossls and orthos for binoviewing and you could go up to 24 or even 32mm without vignetting. However I do have pairs of 24mm Panoptics and 13T6 Naglers and they are excellent for binoviewing as well.

#10 Buonarroti

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Posted 07 May 2013 - 04:05 PM

Thanks again everyone..some great info to digest...
Johnnyha, can you tell me a little more of your viewing experience with the ES 16 & 20. They are currently on sale and I might pick up both.

#11 johnnyha

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Posted 07 May 2013 - 08:15 PM

I never tried the 20mm, I'm a 19mm Pan guy. I understand though the 20mm are nice and have a little more eye relief than the 19mm Pans and a little flatter field. The 16mm ES are excellent bino eyepieces but I finally sold them, just couldn't get used to my eyelashes brushing up against the housing. But very well made, very small and other than the relatively short eye relief, great for binoviewing.






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