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Equipment Discussions >> Electronically Assisted Astronomy

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nytecam
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Reged: 08/20/05

Loc: London UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: PEterW]
      #6261286 - 12/19/13 03:22 AM

Quote:

Yes, but like a TV, but it's bright and you can take a picture of it with any camera you can poke down the eyepiece.

PEterW


Thanks Peter - that's the standard / casual technique but is it efficient ? When we talk of CCD cameras the overall QE is important - why isn't it with EODs !!

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Dxvid55
member


Reged: 12/16/13

Re: DIY Intensified IIT setup for around $200 project. new [Re: Dxvid55]
      #6263619 - 12/20/13 12:15 PM

Just changed the link for the blog mentioned on page 2, to make it more search-engine friendly,

http://imageintensifier.blogspot.co.uk/


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Furmo
member


Reged: 01/17/13

Loc: York, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6301806 - 01/09/14 11:13 AM

Please accept my apologies, I haven't been back on the forum since I posted so didn't see your request.

I see that Dxvid55 has provided some excellent info on his blog so anything I post will probably be redundant now but I have clear skies predicted tonight so I'll try and take some pictures of my own setup and provide some comments on my kit as well to compliment his.


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De Lorme
professor emeritus
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Reged: 12/30/08

Re: DIY Intensified IIT setup for around $200 project. new [Re: Furmo]
      #6303416 - 01/10/14 02:31 AM

Thanks Furmo, Would like to see the potential of the 7980HP tube before I spend the $200. De Lorme

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De Lorme
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Reged: 12/30/08

Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6311606 - 01/14/14 03:14 AM

Furmo, In doing some research I ran across this statement;
"Ion scintillations increase with input signal, but are more visible when there's high gain at low light levels and not enough signal to hide them".
Is this the reason that the 7980HP would not be good to use with an eyepiece at the telescope? De Lorme


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Furmo
member


Reged: 01/17/13

Loc: York, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6314221 - 01/15/14 11:56 AM Attachment (59 downloads)

Hi De Lorme

Unfortunately you have mistaken me for someone who knows what they are talking about!

I initially bought one of these tubes to assemble a hand-held unit and only attempted to bolt it to my telescope out of curiosity - I know nothing about the technical aspects of these tubes I'm afraid, and it was probably only sheer luck that I got my 2 projects to work! Hopefully someone more intelligent than me will be able to help you with your question!

I did drag my gear out the other night but, as I suspected, my results add nothing to the excellent blog above.

I have attempted to attach an image I took through the eyepiece of Orion (using my mobile phone camera). It's not very good and doesn't really do the real view much justice - comparing it to the view I had through the scope with the cascade tube removed, I would say I could see twice as much of the nebula with the P8079HP attached. For info, I live in a terraced house near a city centre so light pollution and other viewing conditions are pretty awful.

Living in North Yorkshire, I also only had a limited window of time before the clouds rolled in and prevented me trying any other targets.

I'm sorry that I probably haven't helped you one bit, I was fortunate enough to buy my tubes when they were a lot cheaper than they are now so I appreciate your reluctance at the current price.

If I get any clear skies again soon, I'll try and carry out some more tests.

Regards

Furmo


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De Lorme
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Reged: 12/30/08

Re: DIY Intensified IIT setup for around $200 project. new [Re: Furmo]
      #6315672 - 01/15/14 11:58 PM

http://imageintensifier.blogspot.co.uk/
Hello Furmo, You've been a lot of help;and I know next to nothing about image intensifiers to. Take a look at Dave
Jones web site{above}. He said when the moon goes away{and he gets a chance}he will take a picture of M79 which is a
Mag 7.7. This is really exciting. I've been believing for a solution to cut through the light pollution. In my minds
eye I'm thinking that the 7980hp will show a 40 to 45 degree
view with the heart of the view pretty good; which clusters and most nebula will fit nicely into. Yes it won't be a Generation 3 but as a comparison plossi eyepiece at least
let you look and this will{hopefully} be even better.
Clear Skies, De Lorme


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De Lorme
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Reged: 12/30/08

Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6321681 - 01/19/14 05:46 AM

Hi Furmo, What eyepiece are you using? Are you using a 1.25
eyepiece{low or high profile?}adaptor attached to the intensifier and then the eyepiece inserted into the adaptor. Any advice would be gratefully appreciated.
De Lorme


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PEterW
professor emeritus


Reged: 01/02/06

Loc: SW London, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6321950 - 01/19/14 10:53 AM

I use a 10x magnifier I had though some people use 25ish mm plossl eyepieces that are chopped down, anything that magnifies the screen a hit is fine.

PeterW


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Furmo
member


Reged: 01/17/13

Loc: York, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6328211 - 01/22/14 12:09 PM

Hi De Lorme

I dismantled a cheap 15mm Celestron eyepiece which came with my telescope and experimented with putting the lenses in different positions using washers until I found the perfect position for it to focus on the rear screen of the cascade tube.

I made an eyepiece holder by cutting the end off an eyepiece cap and stuck that in place - this allows me to use the single adapted eyepiece on both of my cascade tubes, depending on whether I want to use the one attached to my telescope, or the hand-held unit.

Probably a bit crude compared to other peoples solutions, but it works well for my setup

Furmo


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De Lorme
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Reged: 12/30/08

Re: DIY Intensified IIT setup for around $200 project. new [Re: Furmo]
      #6331852 - 01/24/14 02:31 AM

Furmo which Celestron 15mm{Plossi, Ortho} are you using? Would you take a picture so I could see how you attached the eyepiece? Exactly what do you mean by dismantled and
how did you apply the washers. OH Please give me a picture!
Thanks for the help. Will be buying the 8079HP soon. I can't wait to assemble and try it out on M79 and 42.
De Lorme


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Furmo
member


Reged: 01/17/13

Loc: York, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6338265 - 01/27/14 08:31 AM

Hi

REALLY sorry for the late reply - life has been very hectic recently and I rarely get on the net these days.

I will take some pictures and provide more details when I get home tonight.

Sorry again for the delay in my reply.

Kind regards

Furmo


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De Lorme
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Reged: 12/30/08

Re: DIY Intensified IIT setup for around $200 project. new [Re: Furmo]
      #6339564 - 01/27/14 08:22 PM

I understand, Sounds like your running with your tonged
hanging out!LOL. This is so exciting! I believe this is a real solution to the light pollution and aperture problems!
I can't wait to see the picture and info.
Thanks for the help. Clear Skies, De Lorme


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De Lorme
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Reged: 12/30/08

Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6339751 - 01/27/14 09:50 PM

Furmo, BTW my intensifier is on it's way from Starlight.
De Lorme


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Furmo
member


Reged: 01/17/13

Loc: York, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: De Lorme]
      #6340251 - 01/28/14 05:58 AM Attachment (26 downloads)

Hi De Lorme

Please see the attached photos!

The eyepiece holder is simply an eyepiece cap with the end cut off and then superglued into place - it actually fits PERFECTLY into the rubber ring around the projection screen.

The eyepiece I took apart came with a Celestron accessory kit I got free with my Nexstar scope. It had 2 glass elements and I just experimented with swapping them around in various positions using plastic rings and washers before I found the perfect position. I tested this by placing the EP on a mobile phone screen to see if it reached focus at (effectively) zero distance.

I think I actually ended up using the bottom of the 2 elements placed on top of a plastic ring which was originally on top of it (if that makes sense) so after all the trial and error, I didn'y actually use any additional parts!

I have also included a photo of my assembled tube for reference.

I hope some of this proves useful, and please do let me know if you have any other questions!

Kind regards

Furmo


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Furmo
member


Reged: 01/17/13

Loc: York, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: Furmo]
      #6340252 - 01/28/14 06:01 AM Attachment (21 downloads)

I just realised I can only post one picture with each message - this is what the EP looked like before I dismantled it:

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Furmo
member


Reged: 01/17/13

Loc: York, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: Furmo]
      #6340254 - 01/28/14 06:01 AM Attachment (16 downloads)

And this is it in bits:

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Furmo
member


Reged: 01/17/13

Loc: York, UK
Re: DIY Intensified IIT setup for around $200 project. new [Re: Furmo]
      #6340255 - 01/28/14 06:02 AM Attachment (22 downloads)

Finally - this is the finished unit:

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StarStuff1
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Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: DIY Intensified IIT setup for around $200 project. new [Re: Furmo]
      #6340902 - 01/28/14 12:41 PM

A photographic deep red filter should help some with the light pollution. Put it between the eyeepiece and the output lens.

Good luck and best wishes with your IIE experience!


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De Lorme
professor emeritus
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Reged: 12/30/08

Re: DIY Intensified IIT setup for around $200 project. [Re: StarStuff1]
      #6341395 - 01/28/14 04:23 PM

Furmo, The tube that goes into the diagonal is it just taped into place on the intensifier? Does it seem pretty stable in the diagonal? Is it a 1.25" or 2" tube? Thanks for the great help! This is going to be easier than I thought. It's freezing cold here in Colorado Springs Co
and it's going to be this way for a week! The intensifier has been shipped and I cannot wait to put the intensifier
together. Thanks again and Clear Skies! De Lorme


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