Deadlake

I think you would get a difference for imaging if you went with a faster scope, but you are going for F7.5 scopes which are relatively slow. magic fluorite dose not help you there. By the way, both of those scope where on my shopping list but got crossed due to availability of faster scopes.

Everything for Vixen going through Bressner is a bottleneck. Pre Brexit but during the pandemic the SXP2 I bought took about two weeks to arrive. I knew it was in stock, just the shipping. The latest scope I’ve bought in Janauary sourced with parts from Germany and America still has not arrived. Brexit is more of an issue I hear then the pandemic. Also constant issues with logistics (for all orders the dealer is procuring). I think this the new normal. For the next large orders I’m going to try RVO as they will accept a deposit and charge when on route to them.

@JeremyS he does like to get a good handle indeed. 😀

Compared with a Celestron maybe? If so, you should tell @JeremyS as he is not sure of the advantage of Takahashi over Celestron SCT'S yet. 😀

I was joking. Reading some CN posters experience with collimation is sounds a mystery any one gets it to work. 😀

Show off. 😀

This is mentioned al lot on the CN thread, Information on the Takahashi Mewlon 210 and Mewlon 250 Hotech Deluxe CT Collimator However there must be other options? A Mewlon is on my list, just wondering what I need to buy as well.

Apparently not, but there are other options.

I think thesis covered here: Information on 210 and 250 Mewlons

9.25 is 36% by diameter and 13 % by area https://www.celestron.com/products/c9-25-optical-tube-assembly-cge-dovetail in specification tab, however no description of measurement. The Mewlon 180 is around 30% and the 250 around 28%. Which would explain contrast differences. However on CN its reportedly bigger around 32% for both,....

Both the C9.25 and Mewlon 210 are around 33%...

For visual, a central obstruction of less 22 % you’ve mentioned in the past, presume you mean by area?

Are APO only keepers?.?

The points I took away where: The Mewlon was sharper over the SCT's by owners of both. The TSA120 was competitive unless you has a night of exceptional seeing. Mewlon better at not dewing, then a SCT. Unsure which was harder to collimate, the SCT of Mewlon. Mirror shift, both SCT and a Mewlon seem to get sent back. With point 2 how much bigger do you need to go to get some benefit or all seeing/temperature delta related? PS: Mewlon is green, matching colour scheme.

We could just ask John Bobben on Do I need a Mewton 210, yes!, he has both after all, I think the Mewlon is sharper. If I was using the scope as just a light bucket, then the C11 would be ok, however for planets when seeing allows a larger aperture the Mewlon takes the lead. The Mewlon is not dew prone as the C9.25 or C11, however some loss of aperture which makes tricky decision.

If AP is you main use a 130mm/F6 LZOS is worth a look. Speed always helps for capture and not too heavy when compared with other scopes. You can also get a phenolic tube option which will not dew and more temperature stable (better than aluminium) for maintaining focus.

The Mewlon 210 is attractive, however hard working out worth over a C9 or C11 (comparable price).

Indeed, the mirror of this thread on CN is funny to read. As one of the poster's said on CN, "How CN this thread is".

Have you done first light, x234 magnification I see. Is the Tasco the best 3" refractor ever..... 😀

Since its parfocal even more interested. What a waste of time on CN.

From Mr Ludes here more factory news , my questions and factory answeres Some advises and questions 1, what ist he eyerelief from top of mechanic at different focal length ? 7.7mm: eyerelief is 18mm 15.4mm:eyerelief is 20mm 2, can you do again dual barrel 1.25“/2.“ Like on XWA eyepieces ? Yes, similar to XWA 1.25 and 2” barrel 3, can you engrave for astronomy use the focal length and not the power on the eyepiece ? Yes, our other zoom eyepieces are with focal length.7.7，8.7，10.2，12.2，15.4 4, can you design the top to accept the Tele Vue Astigmatism corrector called Dioptricx > https://www.televue...._page.asp?id=54 ? more details here > https://www.widescre...-corrector.html This adapter should be easy to make, we plan to make this corrector on our eyepieces 5. Whats the body diameter ? The diameter of the largest part (rubber grip) is 53.8mm, and the diameter of the remaining part is 53mm or so. 6. Will the new Zoom be parfocal on all length ? It is parfocal at different focal length. 7. If you can do the eyeside with a conical shape you will increase very much the sales 1.25”barrel is straight, the top shape is conical like XWA If you can do click stop zoom you gain another better sale It's a little bit complicated and difficult to add to this device The eyecup is similar to the 12.5eyepiece, fold-up. We have designed two product style, the right one looks very nice.

Saw the CN thread, scan read it as so much *froth*. Thought I ask the question on SGL as I thought it would not cause *noise* until we got a definite answer.

The cost of living is on the up as well in the Far East, I suspect in the end it will meet in the middle. Issue is the twenty/thirty years in between where an equilibrium was being found.

I didn't plan for a long outage, the longest our village has been without electricity is a week over xmas five years ago. Luckily it was just half the village, the pubs where still operational and cooked everyones xmas lunch where they could. Having a second car helps if one is used as a generator. Interesting idea about using PHEVS to generate energy to store overnight.

I once plotted get a PHEV. You can run the power in reverse and power the house from the car. That way you don't have some machinery hanging around that you don't know its going to work until it's too late.