APM lens in cell modification

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Lady Fraktor Slovakia
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APM lens in cell modification

#1

Post by Lady Fraktor »

Since the Celestron C6-R has been modified considerably, (the only 'original' part is the tube and even that has been modified)
I will have to think of something new to call it since it is definitely no longer a Celestron.

Report on the add on lens will be delayed...priorities ;)
The annoying part is that the sky conditions will be perfect again but we are leaving at 09:00 for Praha.
Praha Rocks tomorrow! :)
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Re: APM lens in cell modification

#2

Post by Graeme1858 »

Lady Fraktor wrote: Wed May 31, 2023 5:12 am Since the Celestron C6-R has been modified considerably, (the only 'original' part is the tube and even that has been modified)
I will have to think of something new to call it since it is definitely no longer a Celestron.

Report on the add on lens will be delayed...priorities ;)
The annoying part is that the sky conditions will be perfect again but we are leaving at 09:00 for Praha.
Praha Rocks tomorrow! :)


The Slovak Frak?

I hope life calms down enough for you to use your new birthday present soon.

Will you have have time to visit the famous Astronomical clock in Prague?

Regards

Graeme
______________________________________________
Celestron 9.25 f10 SCT, f6.3FR, CGX mount.
ASI1600MM Pro, ASI294MC Pro, ASI224MC
ZWO EFW, ZWO OAG, ASI220MM Mini.
APM 11x70 ED APO Binoculars.

https://www.averywayobservatory.co.uk/
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Re: APM lens in cell modification

#3

Post by Lady Fraktor »

The government would likely claim it if I named it that :lol: I need something more expressive :)
Things should slow down a bit sometime around November. Tourists and motocycles, never dull moments!
I have seen the clock may times. My brother lives within walking distance of old town and there are some good shops there.
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Re: APM lens in cell modification

#4

Post by Lady Fraktor »

With the time available of late I have had to move the tube baffles back 1.5 mm.
The new lens cell is also designed for a sliding dewshield. I have come to the conclusion that instead of a press fit, I will make a wrap around from plastic sheet and velcro closure.
I will then have to make a lightweight dewshield cap possibly with a aperture reduction cap as well.

During a quick test the new lens operated very well on the lunar surface. Unfortunate that Jupiter and Saturn are not around to test the lens.
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Re: APM lens in cell modification

#5

Post by Bigzmey »

Any detectable CA on Moon, bright stars?
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Delos, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.
Solar: HA: Lunt 50mm single stack, W/L: Meade Herschel wedge.

Observing: DSOs: 3122 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2196, S110: 77). Doubles: 2461, Comets: 34, Asteroids: 261
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Re: APM lens in cell modification

#6

Post by Lady Fraktor »

I had about 1 our break in the clouds so set up both the 152 mm and the AOM 105 to compare views.
Though the 152 mm is only a doublet of FK-61/ LaK-53 it only produced colour in view as I focused on a object.
Once focused there was no disernable colour shown. Colours were very slightly softer/ paler than the 105 mm and quite pleasing.
On the lunar terminator I had to push the magnification above 50x / " to have it start to show even a slight touch of violet.

So far I am quite impressed with the performance and am looking forward to a good night spent with it.
Looking at pines 100 m away during the daylight, I have to look quite had to see any fringing along the branches.
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Re: APM lens in cell modification

#7

Post by Lady Fraktor »

For those that like to look at numbers and charts :)
I still need to get material for the dewshield before a proper session is done.

4 APM 152 f8 FK-61.png
5 APM 152 lens in cell Strehlkurve A.jpg
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Re: APM lens in cell modification

#8

Post by Lady Fraktor »

Things are progressing slowly, the order of flocking has arrived though I still need material for the shade.
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