Hello. I just joined the group because I am thinking of buying a GTF-81. I'd like to find out how GTF-81 owners feel about the scope. I intend to use it...
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Ray Hurst
ka4gbr...
May 10, 2013 11:55 am
Hello Keith, I purchased a GTF 81 with the same questions that you have. The scope is good for AP mainly for Wide field images. I ask about the reducer but...
22358
underdriven255
May 10, 2013 5:54 pm
Hello Ray, Thanks for your response... ... Yes, clearly a reducer with flattening built in would cause distortion. It is possible that this one would not: ...
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ka4gbr
ka4gbr...
May 10, 2013 7:11 pm
Keith, I bought my scope from Ageena. They have always given me great service. I received the upgraded focuser from William this week. It looks like the stock...
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underdriven255
May 10, 2013 8:04 pm
... They seem to be very responsive to my questions. I'm glad to hear you have found them good to work with... ... That is very interesting. When did you buy...
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Ray Hurst
ka4gbr...
May 10, 2013 11:03 pm
Keith, My scope is a little over a month old. It came with the new DDG focuser. It would hold the weight but there was a lot of play in the barrel and It had a...
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underdriven255
May 12, 2013 4:51 am
Ray, Thanks for the clarification. I'm not quite sure what to make of what Agena has told me, as it is at odds with your experience... In any case, it seems...
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Timm B
timm_bottoni
May 12, 2013 2:28 pm
Hi, The GTF102 is a larger version of the 5 element design with the built in field flattener. When I bought it, William advised me that I would need a 1.25"...
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Ray Hurst
ka4gbr...
May 12, 2013 2:43 pm
Keith, I have used a 2 inch diagonal with eyepieces from 4mm to 20 mm with no problem. I am not sure how to calculate distance with the built in flattener . I...
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underdriven255
May 12, 2013 6:31 pm
Hi Ray, ... Interesting. How far is the focuser extended when you use a camera? I would think it must be fairly far back if you have enough back focus to use...
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underdriven255
May 12, 2013 6:52 pm
Hi Timm, ... I am familiar with GTF102--it's a bit too big for me, although it is an impressive unit. Looking at the focal length vs. the tube length, the...
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underdriven255
May 12, 2013 6:54 pm
... I should have looked closer, as this is actually an Optec unit and therefore is available here in the US at a lower cost: $275 (from their price list). ...
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Timm B
timm_bottoni
May 12, 2013 8:23 pm
Hi I don't have a flattener to try. Regarding the focusers, the DDG part is an electronic piece, and I have an original one on my 80FD which is a Crayford...
22369
underdriven255
May 12, 2013 9:00 pm
Hi Timm, I realize that the DDG is the digital readout part of the focuser, however I am trying to use that in order to differentiate between the original R&P...
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Ray Hurst
ka4gbr...
May 12, 2013 9:55 pm
Keith, With a 2 inch diagonal and a 6mm eyepiece the focuser is extended about 15 mm . With a 20 mm is about 20 mm. When I use my SBIG ST8300 and QHY filter...
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Carlos Cardon
cdcardon
May 13, 2013 3:46 pm
I own an older FLT-110 (with TMB optics) and have a couple of questions for the group: 1. After a few years, I began to have a lot of trouble with the ...
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Timm B
timm_bottoni
May 13, 2013 6:19 pm
Hi I think William is going to offer the non-DDG R&P focusers for sale as replacements for a variety of older scopes. I'm not sure the of the prices, and I...
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Timm B
timm_bottoni
May 14, 2013 12:21 am
Hi again, I checked with William and he is going to sell the new R&P focusers (without DDG) for $198 for the 2" model that fits 80-90mm models and $350 for the...
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Mike Tapper
tapsky01
May 14, 2013 1:07 am
Timm, Are there any photos and specs available for the 3.5" R&P focuser ? Mike T...
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Timm B
timm_bottoni
May 14, 2013 1:58 am
I'm not sure Mike, I don't see anything online on the WO site yet. I will see if William can let us all know. Timm...
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notgnirramot
May 14, 2013 1:03 pm
I have the FLT 110 Lite, which has a "Power Linear Focuser", everything else is the same, TBM optics etc. My Focuser works pretty well for astrophoto's with a...
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ka4gbr@...
ka4gbr...
May 15, 2013 3:59 am
Tried to capture Saturn with my GTF-81. ...
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Monica Garliceanu
monagarliceanu
May 15, 2013 5:36 am
Hi Gianluca, Thanks for the feedback. I think in time I will get more eyepieces, these are just for start (as I can't afford all of them at once). I tried to...
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Ray Hurst
ka4gbr...
May 15, 2013 12:17 pm
Monica, I can’t comment on the eyepieces because I only use my GTF-81 got imaging. I only have a few very old eyepieces. As to the Flattener , you are...
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Craig
cgsathome
May 18, 2013 1:27 pm
Hi - I'm a new member and recently purchased a very lightly used 110FLT Light. I have been able to start acquiring images using the AT2FF (which I already...
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kcgolden@...
oldmanklc
May 18, 2013 3:03 pm
Hi, I have a flattener specifically for the flt 110 that I've never used. If you our anyone else wants it, it is yours for $400. Contact me off list. ~Kelsey ...
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kcgolden@...
oldmanklc
May 18, 2013 3:12 pm
Sorry, didn't realize the retail price came down. It used to be 795, now 495. I'll sell mine for 300. Again, I've never used it. I just took it out of the box...
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notgnirramot
May 19, 2013 2:57 pm
Congrats on your new to you scope. I have the same Light version, I also image with the ST8300, FW5, & the SBIG OAG. My Focuser holds the load, but I tighten...
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Craig Smith
cgsathome
May 19, 2013 3:24 pm
Thanks for the input, Tom. I was at the Texas Star Party, and apparently the warmth during the day removed all residual friction from my power linear focuser....
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spsesq89
May 22, 2013 10:18 pm
Hello all I am new to this group and I hope you may be able to assist me. I am ready to pull the trigger on a purchase of the new FLT110. If purchased now it...
