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Everything posted by Solar B
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It's been designed from the outset to fit within Ariane's fairing but it's delivery to L2 has never been the issue.
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Halloween 2021
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I didn't know of that scope but can see it's a CaFΒ² !! Most Baader gear is affordable or within reason that isn't but I'm sure it'll be world class. Brian
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Alan I'll PM you , probably better Brian
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I donβt know if itβs actually lighter but is wider certainly than the 4.5mm eg & could well be of a different design π€ Brian
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Lol π ... I know ... this states for the 17.5mm could that much anticipated EP (not by me) be of different design to the others ? I guess we'll never know π Brian
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My guess for the design would be Deutschland as is impressive 8 lenses in 5 groups ... with 3 ED & 1 Lanthan lens. Brian
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Iβve a full set but Iβve no idea where they are actually manufactured ? There are no marking of origin on the EP that I can see either ! Brian
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Def worth a shot me thinks as they're not cheap to & you / we don't really know how good there are ? Brian
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John I would place a wanted ad for one ... one did come up for sale a couple of yrs ago on UKABS. Brian
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In my experience clear or obvious granulation views are quite elusive even with 4" ..ED or 6"..AC scopes using a 2" H Wedge so it's not given as such. Brian
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Agreed I think SCs do help with bringing out a touch more detail but they're real benefit I find is with focusing here the limb or AR (remember those) can be fine tuned. As for DS SCs well I think this could display a tad more detail but it'll be subtle Brian
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I'm thinking if stacked together they would require to be tilted given the mirror finish however if apart then perhaps less so ? Brian
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Yeah have to agree with Ken .... I tried again latterly this evening .... this time with a 100mm F11 , at first I thought yes I am able to see a little more granulation but think I was imagining it all as switching back to the single 2" Contin I felt provided a sharper image from the cool wedge , not conclusive but there you go. Brian
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System Wavelength: 656.28nm. Hydrogen-alpha (tuneable, dedicated)System Focal Length: f10Sun Image Size: 3.67mmObjective: Precision Doublet (Optimized at 656nm)Blocking Filter: 5mm standard (upgradeable to 6mm or 12mm)Etalon Size: 40mm full aperture precision Lunt EtalonEtalon Peak Transmission: >88%Etalon Net Finesse: 19Etalon FSR (Free Spectral Range): 12 AngstromsEtalon Tuning: Conventional Tilt through +/- 1 AngstromEtalon FWHM (Bandpass): <0.65 AngstromWeight of Telescope: 2.8lbs Well it is unobstructed , I've no idea what the Etalon Net Finesse: 19 is a measurement scale of ? but that's what Etalon's are ultimately all about .... Finesse ! Brian
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I just don't know ... however if it does work I'll be interesting in trying the real thing or obtaining another 2" contin for the wedge. Brian
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No your quite right they're centred at 540nm so 2 shouldn't make any difference ? & I remember they're purpose being questioned at launch but that was before anyone had tried one I think and Peter's quite right the tilting will be to prevent reflections just like an ERF is or should be π Brian
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I'll certainly report back Stu if/when I get the chance ... obviously try it to , it does look promising 're Johns link and that's what I was hoping for a little more granulation detail but as Ade suggests stacking 2 may make no visual difference. Brian
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I was all ready to rock with a 2β Contin in the wedge & a 1.25β on the EP when the clouds rolled in π Baader sell a stacked Contin filter so I was interested to see if 2 will make any difference π€·ββοΈ Brian
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Looks great ... which do you recall is the superior kit the Airfix or the Revell it' was only 50 yrs ago π Brian
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Quarks have been out for 5 or 6 yrs now and there consistency does not appear to be improving imho .... I had to obtain mine from Sweden at first as they were just not available in the UK after launch .... but that and another early model I've tried were good however they do take a lot of getting used to and are quite seeing dependant , one thing I always ask someone considering one is..... do you like barlows ? and would you ever consider using a 4.3 x one under any circumstance ? Brian
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I wouldn't be letting go of any of the above named scopes and certainly not for any Lunt .... I have a feeling the quark may be worth some perservation , both I've tried worked well around the 6 o'clock position / what about the 60mm SS to ? However I have always recommended commencing HA viewing with the likes of a PST and learning from that platform which is always good π Brian
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Hi Folks Iβm looking for 1 or ideally 2 set screw bolts for an unrelated project but they are the same fit as this WO 1.25β diagonal if anyone can advise. Thanks ... Brian