Camera Projection Eyepieces

[CowsonConcrete]

Hi,

I recently sold my reflector and bought a Skywatcher 130P DS.  I have dabbled a bit in basic astrophotography imaging but with a new scope comes a new idea.  

I have scoured the net, literally every single page , looking for a 25mm eyepiece (1.25" or 2") with threads to attach a t-ring.  I have seen them for 32mm but nothing smaller.  The 32mm wouldn't give me much mag with my scope, I know thats not important but I currently have a 23mm (2") which came with the scope and like the views through that.  

I currently use a Revelation Astro Eyepiece projection adapter but I'm struggling a bit with light issues on the new scope so thought taking adapters out of the question may help.

Could someone tell me if they do exist? Are they any good?  Should I just buy a "super" Plossi 25mm and persevere with what I already have?

Any help would be greatly appreciated.

Many thanks

Al

[michael.h.f.wilkinson]

I thought the Hyperion 24mm allows a T-adapter to be fitted. I personally prefer using Barlows (or better still Telecentric lenses like the TV Powermates or Meade TeleXtenders) to extend the focus of my scope for imaging

[CowsonConcrete]

Thanks for that.  The Hyperion looks good but unfortunately would be on my dream team of eyepieces due to the cost. 

[Cornelius Varley]

You can also increase the magnification by increasing the distance between the eyepiece and the focal plane.

eyepiece projection rev2.xls

Is a small spreadsheet which calculates the magnification for you. Change the values in the yellow boxes to suit your telescope / eyepiece.

[CowsonConcrete]

Thanks for the spreadsheet.  The 32mm looked good but I was advised (via another spreadsheet) that the magnification would be too small.  Wouldn't using a barlow reduce the field of vision thus negating the need for a wider EP?

Excuse my ignorance if this is a stupid question!

[Tinker1947]

As mentioned the Hyperion 24mm will work but needs a 42/43mm adapter ring, all Hyperion types and all Pentax XW's have the thread and all need the adapter ring, but you only need one ring......not only will this magnify the object, but also and tracking errors ect....

[michael.h.f.wilkinson]

I used to get good results with a Celestron 26mm Plossl (made by Vixen) and Meade variable eyepiece projection adapter. Getting reproducible results on planets was hard, however.

[CowsonConcrete]

Just as a quick question would a Hyperion fit onto a standard t ring and camera adapter? I use a revelation Ep projector and t-ring for my micro four thirds camera. Do Hyperions use a standard fit?

Thanks

[glowjet]

If you have a look at Baader`s web site, they produce adapter rings to attach their products to almost any type of camera, it is also worth noting that eye piece end of all the Hyperions is threaded to take T ring adapters, if I remember correctly they have produced an adapter chart for guidance