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  1. #1
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    Default TMB 8mm Planetary



    After some deep thought, I'm considering ordering it tomorrow. I have read some good reviews on it. It's not the "Type II" that they say will sell for $99, but the one with the black barrel for $59. Seems like a good buy.

    It's the eye relief that finally got me hooked, plus the fact that I can use it easily in my ST80 and 8" SCT without overpowering. The eye relief is stated at 14mm (Astronomics says that's "useable eye relief"). Not bad for glasses. Could be a tad longer for me, but maybe it will help keep down blackout and be very comfortable to view through. The ST80 would get 50x and the SCT would get a nice 254x (a little high for some nights, but I'm sure I'll use it often). With the 2x Barlow, that would be 100x in the ST80, about 33x per inch of aperture. That sounds doable most of the time. No chance for the Barlow in the SCT except just for grins. The moderate 58° apparent field of view may help the ST80 not have too much curvature going on like a super-wide eyepiece would possibly cause. We'll see--I think. The price sure is good for what you get, from what I hear. And it only weighs 5 oz.

    Bear in mind, this isn't Burgess Optical (i.e. BO/TMB). Just TMB, all black, whatever they are.
    Last edited by RussL; 04-15-2009 at 02:07 AM.

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  3. #2
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    Default

    .. that is a very reasonable price Russ ... good stuff ... look forward to your review ...

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    Bill - "Recreational 'Stronomer" and "Astro-Junk User" ... EGO lego , proinde EGO operor ...

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  4. #3
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    I've been looking at these TMBs for a long time, among others. The Astro Tech Paradigms, too. Can't resist the price on the TMBs, though, in light of their proven excellence. The only bad thing I've heard is maybe some stray light on something like the moon when it's just off the field of view. Kinda hard to find small eyepieces with lots of eye relief, no blackout, and a reasonable field of view to boot. But at $60, well, I just gotta try one.

  5. #4
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    Hi jack , That sounds like a good deal your getting . But you know me , I am a meade junkie .LOL
    16in Night sky
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    Quote Originally Posted by roverich View Post
    Hi jack , That sounds like a good deal your getting . But you know me , I am a meade junkie .LOL
    I looked at some Meades, too. It's been difficult to get all the specs right where I want them, especially the eye relief, and when I get it right something else is wrong. I'm also looking for ideal exit pupil size as much as possible. The 8mm will give a 1.6mm exit pupil at 50x, or 0.8mm at 100x in the Barlow. If I could I'd get one with a 2mm/1mm, but that would take a 10mm eyepiece in the ST80. In the SCT, it'll be 0.8mm at 254x. 1mm and 2mm exit pupils are good for planets. The 8mm is in the middle. The 0.8mm isn't too far off from 1.0. I dunno how much difference that will make. I'm sure 100x will suit my seeing most nights, though. More will not show any more detail, not in my sky at least.

  7. #6
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    Hi jack ...Yea , i know what you mean about eyepiece specs , or rather conflicting specs ... I have a series 5000 plossl 5.5 , 9 and 14mm eyepieces in 1.25in format . After i read your thread i checked astronomics and they said the eyerelief on the 9mm isent the same as what meade says .Meade says 6.8mm with the 9mm and 10.4 with the 14mm .. I dont have any trouble with them although i view without specs . I have checked out the moon with the 14mm and the 9mm and that was enough power for me . Individual craters with cast shadows from edge to edge of field .... Just a thought ...You could go with a ultra wide angle 8.8mm ..they have a degree field of view and 15.6mm of eyerelief , but they are 149.oo from meade .. They are 7 element and have blackend edges and are fully multicoated ..Oh yea . They weigh in at 300 grams . That figures out to 9.3 something ounces ...or there abouts ...
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    Thanks, Rich, but I just ordered the TMB 8mm. I think it will work. Just a tad shorter on eye relief than I'd like, but like I said, that might make it easy to look into and not have to worry so much about eye position. I'm really trying to keep the size down so I can still rotate my diagonal some. I hate redoing the tripod height.

    Now I'll get to see if all the hype about TMBs is so. It would help if I had a dielectric diagonal. Mine's the OEM that came with the SCT. Guess that'll be next on the list. This will make the first truly good (I hope) eyepiece I've ever had other than the two Sirius Plossls I inherited. The 40mm is too much, and the 7.5mm is too hard to see into. My OEM 25mm Celestron SMA is a glorified Kellner and isn't made for fast scopes. It's ok, but... Otherwise it's the three Ramsdens--not good. So, with the Kellner, the TMB, and the 2x Barlow I'll have 4, 8, 12.5, and 25. I can kick around with that for now. I can use all that in the SCT except the 4.

    Hope it comes soon.

  9. #8
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    Thats cool jack . Congrats on the new glass ... Be sure to post a review ... That is , after the clouds clear of course ...
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    Quote Originally Posted by roverich View Post
    Thats cool jack . Congrats on the new glass ... Be sure to post a review ... That is , after the clouds clear of course ...
    Will do, Rich. They say it should arrive Monday, so don't expect to be able to see anything that night, lol.

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    I GOT IT!!!! Woohoo, hee, hee, ho, ho!!! It arrived at my wife's work address this morning. Lunchtime now and I have it at my work. The sky looks good outside. Maybe the Curse will give me a break tonight.

    It's beautiful, nicely packaged with a nice little black box. I can see the whole field of view with the twist up feature all the way down with my glasses on. It also has a soft rubber eye guard. With it down, too, I can see the whole field easily without touching my glasses to it. With the rubber guard up I can still see the whole field if I put my glasses againnst the guard. Amazing. That's what Astronomics says is 14mm "useable" eye relief.

    Get this: the invoice inside the box says, "Items Total--$40.00, Shipping and handling--$7.95, TOTAL--$47.95." Then at the bottom, "NEAF special." THAT'S $20 LESS THAN WHAT I WAS EXPECTING!!!!!!!! Holy moly!!!!! Sale price was $59.95 plus the shipping. I don't know how many items they do this on right now, but it may be a good time to shop.

    When I get home and try it out I'll star a new thread on the review. Mercy me, what a good buy!!!!!!!!

 

 
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