John

But they do provide pupil guides with the models that are most sensitive to this.

I think it's a standard F/5 achromat. Similar performance to the Skywatcher ST80 probably (which are not too bad for CA) but a more individual looking scope. Vixen also produced some small refractors for Tasco during that era. Good Tasco's to watch out for

Yay ! - I've still got that brochure somewhere I ended up with one of their 6" F/6 newts instead 1st "proper" scope and a huge upgrade over my Tasco 60mm frac.

What happened to the Giro mount Jules ?

Indeed. My TMB / LZOS 130 uses neither Ohara FPL or Fluorite. LZOS use their own proprietary glass types (OK4 and OF-1) in their objectives and I believe don't make this available to any other optical manufacturer. The results judging from my example are very, very good

I was a doubter until last year. They are.

My ED102SS replaced a Skywatcher ED100. I was expecting a slight drop in CA control and possibly sharpness but I didn't see it to be honest. The lens is well figured in the F/6.5 Vixen but the Tak is even better. FrT Telescopes do an F/12.5 120mm ED doublet refractor. Quite expensive though: http://www.frtelescopes.com/frt120ded.html

Here is a short post I made on the CN forum comparing the two: https://www.cloudynights.com/topic/541112-vixen-ed102ss-and-takahashi-fc100dl-brief-comparison/

I think the Deepview eyepieces are a modified 3 element kellner type design.

I have to say that I feel the prices for the 35mm Eudiascopic are a little on the steep side if they are the same as the old Celestron Ultima 35 and Orion Ultrascopic 35 Last time I bought a used Ultima 35 (which was a few years back admittedly) I think I paid around £45 for it, delivered

I had one for a short while. I ended up using the 32mm much more because I didn't like the 43 degree AFoV of the 40mm as much and the 40mm is not par focal (by quite a few mm) with the other TV plossls. It's a very nicely put together 40mm plossl though.

I can recall a few years back there were rarely any posts on this forum about Takahashi products but quite a few folks had Vixen's of one type or another. Today Tak's seem to be much more frequently discussed so I'm assuming that the ownership levels are higher now. Or maybe my memory is playing tricks on me

Your Skysensor looks so modern compared to the "shoebox size" that my late 1980's one was Jeremy. My old brick had a red LED display just like the old Sinclair calculators and digital watches - very 80's I'll be the modern units are much more user friendly as well. The old ones took seemingly forever to set up

Can't see the pics of yours Dave (edit: oh yes I can now - very nice ! ) Here are pics of my old (I owned this around 1990) Bresser Uranus which was really a Vixen SP102M in a black colour scheme (complete with early Skysensor GOTO) and a couple of my current Vixen ED102SS toting it's Vixen handle and rings, care of your good self Dave plus Moonlite focuser. I've owned the ED102 for over a decade now

So because you can't tell any difference thats it is it ? They are expensive so if you try them and they don't make any difference to you, don't buy them. Oh and by the way, the Nagler T5 16mm is made in Taiwan, not Japan. Most of the larger and more complex Tele Vue designs are made in Taiwan now. There are many very experienced observers around this planet who do use and value Tele Vue's products and other premium brands such as Pentax, Leica, Zeiss etc. This is not an accident and these folks are not just about showing off or throwing money away. They have found over years of comparisons that these brands do have a performance edge and they are prepared to invest as needed to obtain that.

Presumably the people you need to convince are the retailer from whom you purchased the mount from, rather than us ? Probably best to get a refund then pick an alternative mount. Good luck

Here is my Takahashi FC-100DL in white light solar mode:

Thanks Dave I'm still standing when viewing through the 12" dob. It's F/5.3 so I'd need a tennis umpires chair to sit at the eyepiece quite a lot of the time ! My knees are starting to play up though so my habits may well change. Last night was too cold to stay at the eyepiece for long though.

I think the £ sign should be an epsilon symbol ie: ε-130D Ian King have this optical tube at £2,251 - £130 = too good to be true

That sounds like the way I'm seeing it Paul. It does get a little clearer with subsequent viewings but I think I'd need to go to darker skies to take the definition up a notch (apt word !) further. The skies don't get much better for DSO's here than they were last night and on the previous sighting. I'm still very pleased to be able to detect this target at all from my back garden. I'd almost written it off last year

The cold and windy conditions made it less comfortable (ie: harder to stay at the eyepiece and concentrating !) but having found it before helped in terms of realising that it might be "on" tonight and zeroing in on the right patch of sky. So thats a "yes and no" answer !

It's a great feeling to, at least in part, replicate the views that these great names of old might have had

Yay !!! Just repeated my observation of the Horsehead Nebula Wind and cold made it harder than my 1st time around, or at least less comfortable. No doubt about the dark "bite" out of IC 434 and a little averted vision helped tonight. Very good night here but hard to stay dark adapted when popping inside to warm a little !

Heres a nice planetary nebula currently well placed in Taurus, not far from the Pleiades. This evening with my 12" dob I found NGC 1514, AKA The Crystal Ball, hard to spot, as a nebula, but it's 9th magnitude central star is easy enough so the trick is to pinpoint that, then apply the O-III filter and, voila, the star is surrounded by a nice clear and reasonably large ball of nebulosity at 90x magnification. With careful examination some vague structure starts to appear across the nebulosity with the central star still shining boldly forth from it's centre. Without the filter and the star might easily be mistaken for any other - just the slightest haze surrounding it. I guess a UHC would have some enabling effect as well but the O-III makes a great deal of difference to this one, turning it from obscure to fascinating This one was discovered by William Herschel on the 13th November 1790 and he described it as follows: " A most singular phenomenon ! A star of about 8th magnitude with a faint luminous atmosphere, of circular form, and about 3 minutes in diameter. The star is in the centre, and the atmosphere is so faint and delicate and equal throughout that there can be no surmise of its consisting of stars; nor can there be a doubt of the evident connection between the atmosphere and the star." The overall magnitude of the nebula is given as 9.8 but my goodness it looks so much better with the O-III filter Here is the entry from the Observing at Skyhoud website with a nice locational diagram: https://observing.skyhound.com/archives/dec/NGC_1514.html

Very interesting and enjoyable Thanks for posting this Chris