Hello all,
I am a newbie and thus, besides my ignorance in terms of knowledge I also suffer from lack of knowledge of the terms for most of the things you experienced imagers know. So, please forgive me as I attempt to describe the situation and seek answers and advice.
I am trying to settle on some imaging trains for a variety of used CCD cameras I have accumulated. I have a C14 and I did set it up for the Hyperstar, but my current questions concern traditional imaging from the back end.
In a situation where one wants to use an imaging train that consists of 2" diameter elements that can be slid into and out of a 2" accessory, such as a 2" visual back, how does one set things up so that one attains a repeatable depth of insertion on future occasions?
My engineering background leads me toward assembling imaging trains that screw onto the scope, so that there is no difference in fore/aft positioning from one session to the next when imaging rigs have been used, removed, and then re-installed; but, quite a few of the reps with whom I have spoken mention the setup where one slides the train into the securing device and when I ask "how do you get the same position each time?", they seem to think it's not an important issue.
The thing I wanted to ask, aside from whether I am seeking to do something that - indeed - isn't important, is whether anyone is aware of a part that would act like a spacer, perhaps 3-6mm in axial length (1/8" - 1/4"
and fitting 42mm and 48mm diameter accessories, that would have a protruding rim which exceeds 2" in diameter so as to stop the insertion of the train at the same precise spot every time.
Basically, something like a big washer with a 42mm or 48mm hole in it. It would be nice to have it in a material that is sturdy, but wouldn't mar the finish of the other components...
It's interesting, now that I'm writing this, that in the weeks I've been wondering about it, I never stopped and had the thought that what I'm looking for is exactly like a big washer. SO, I will go look for that on the fastener sites.
But, if anyone would care to respond to my question about whether what I'm asking to do is a useless exercise, or if you know abnout something that's made for the purpose, I'd love to have your thoughts.
Thanks to all for thinking about it! Clear skies and good health...
Tim McLarney
I am a newbie and thus, besides my ignorance in terms of knowledge I also suffer from lack of knowledge of the terms for most of the things you experienced imagers know. So, please forgive me as I attempt to describe the situation and seek answers and advice.
I am trying to settle on some imaging trains for a variety of used CCD cameras I have accumulated. I have a C14 and I did set it up for the Hyperstar, but my current questions concern traditional imaging from the back end.
In a situation where one wants to use an imaging train that consists of 2" diameter elements that can be slid into and out of a 2" accessory, such as a 2" visual back, how does one set things up so that one attains a repeatable depth of insertion on future occasions?
My engineering background leads me toward assembling imaging trains that screw onto the scope, so that there is no difference in fore/aft positioning from one session to the next when imaging rigs have been used, removed, and then re-installed; but, quite a few of the reps with whom I have spoken mention the setup where one slides the train into the securing device and when I ask "how do you get the same position each time?", they seem to think it's not an important issue.
The thing I wanted to ask, aside from whether I am seeking to do something that - indeed - isn't important, is whether anyone is aware of a part that would act like a spacer, perhaps 3-6mm in axial length (1/8" - 1/4"
and fitting 42mm and 48mm diameter accessories, that would have a protruding rim which exceeds 2" in diameter so as to stop the insertion of the train at the same precise spot every time.Basically, something like a big washer with a 42mm or 48mm hole in it. It would be nice to have it in a material that is sturdy, but wouldn't mar the finish of the other components...
It's interesting, now that I'm writing this, that in the weeks I've been wondering about it, I never stopped and had the thought that what I'm looking for is exactly like a big washer. SO, I will go look for that on the fastener sites.
But, if anyone would care to respond to my question about whether what I'm asking to do is a useless exercise, or if you know abnout something that's made for the purpose, I'd love to have your thoughts.
Thanks to all for thinking about it! Clear skies and good health...
Tim McLarney
