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About jpwilliams.com

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    Kinallen, Dromara, Co. Down

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  1. Thanks, I've spacers to make the 55mm, just need a clear night to try them out.
  2. I've just taken delivery of the 72ED and OVL FF which @Rustang listed in the classifieds last week. I want to use it with my Altair 183c Pro Tec, which has 17.5mm front flange to sensor, and an Altair filter holder which is 17mm thick with M48 front & T2 back threads. I was planning on adding a 15.5mm M48 spacer, to give the desired 55mm back focus. I've discovered the FF has a M/T?42 thread at the back , luckily I have a suitable adapter which is only a couple of mm deep, so I'll be able to connect my 15.5mm tube (indirectly) to the back of the FF. Plan will be FF > M/T42 > M48
  3. Fitted top & bottom with M6 bolts/nuts. £25 delivered to UK via MyHermes,
  4. Great condition, comes with 2" adapter and original box. £350 by Paypal/bank transfer, collection (socially distanced) from Dromara, Co Down, or Royal Mail Special Delivery £10 extra.
  5. I've a 150PDS I got as part of a secondhand bundle which I've never used. The previous owner appears to have used it very lightly, from what I recall it's complete with finderscope and a 2" eyepiece. I'm in Northern Ireland but it's boxed, so could likely be couriered to England. If you're interested I'll grab some photos. John
  6. I'll take it if there is no-one in the queue before me. Not worried about the Stellarmate license as I already have a Pi with Indi installed, accessed from a laptop running KStars.
  7. Paul Just mailed you about this via astrobuysell then saw it here, can collect in Belfast. John
  8. Interested in the rings, just need to measure my Celestron RACI finder to confirm it'll fit. EDIT - Sorry, my guidescope is 60mm, so doubt this would fit both
  9. Hi James - certainly, I'll PM you details. Thanks John
  10. This one ? DRV8825HW203-M-MT-F-BT seems to have all the options. Showing as €31.02 for three, so say £11 posted inc paypal fees? PM me details and I'll order a set. John
  11. Thanks, found the "To Order PCB" text file, was hoping they'd be available singly from you, which I suppose raises the question, would anyone (UK based) want to go thirds on an order? John
  12. Robert Are manufactured PCBs available, I know you have design files, but thought I saw something in the docs/online about purchasing a board - perhaps I was mistaken?? Thanks John
  13. I've just bought a Celestron RACI 9x50 finder and am trying to mount it on the rings of my EQ5/130PDS. The finder seems designed for mounting on an SCT (why not just regular rings with a flat bottom???) so I want to replace the bottom bracket with a dovetail. The bracket is like an inverted dovetail, so I'm trying to find something similar but long enough to fit between my rings, but can't see anything suitable. The standard Vixen mount seems to be 44mm wide at the base, whereas the top of the inveted base is 59mm wide. There seem to be dovetails available for SCTs which run the length of the
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