XT10 classic with premium optics Tri-knob CR2 focuser
Catseye + Glatter collimation tools
StarBlast 4.5" & 6"
Round Table Platform
Orion XT12i with Swayze-refigured primary & Protostar secondary
Televue NP101 refractor
William Optics Megrez 90 refractor
Universal Astronomics Deluxe Mounts
10" Sumerian, Webster D18, solar scope, small 'frac, Vixen Foresta 8x42 Take action against Light Pollution. Together we can make a difference.
Quote:I second the iterative method. It works very well and is simple to learn. In fact, I find it sufficiently convenient that I've not bothered with the CDP method.
Quote: my issue w/ the CDP is two fold... I also find it difficult to figure out which primary adjustment screw
Quote:Quote: my issue w/ the CDP is two fold... I also find it difficult to figure out which primary adjustment screwCDP is meant for the secondary mirror. You are not suppose to adjust the primary mirror to stack reflections P&3 but rather only the secondary mirror set screws. See attachment.
Quote:If you have the triangle or the Hotspot center spot then it makes it easier to figure out which knob to use providing each corner of the triangle/Hotspot is pointing towards a primary adjustment screw.Jason
Quote:...the ESSENCE of what you're trying to do is stunningly simple: tweak the secondary adjustment screws until ALL the other center-spot reflections merge and disappear behind the brightest one (which is the direct single-pass image of the center spot rather than a multiple-pass reflection of the center spot like the fainter ones are). Once you succeed at this, you're not quite done: recheck your primary's alignment with your cheshire. If (as is more likely) tweaking the secondary to satisfy the autocollimator has nudged the primary alignment off a bit, adjust the primary back into alignment using the cheshire and then repeat tweaking the secondary with the autocollimator. Two or three iterations back and forth will, most of the time, be sufficient to get cheshire and autocollimator to agree.
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
Quote:I have a Hotspot and as with the above pic it is easy for me with the cheshire (single reflection). It is just the final stacking of mulitple images I cant seem to get the stacked perfectly. In part it's due to the small bit of haze around my center spot and the fact that I can't watch the reflections as I'm recollimating the primary (arms arent long enough lol).
The key to seeing more is not a larger scope but becoming a better observer......Jon Isaacs Z 9.74" F/5 11" CGEM with denk S1 5.5mm, 25mm, 32mm plossl 13mm ethos, 22mm T4, 31mm T5, 35mm panoptic pentax 5xw, 7xw, 20xw, 40xw nikon action extreme 10x50W lumicon 1.25" filters Telecat XL, XLK autocollimator, sarasota, florida
Quote: the trick i use to collimate my Z10 is that i sit on my denvar chair, look through autocollimator/cheshire, swing the focuser end of tube from me so the primary end of tube reaches my extended right hand, half a turn on a screw, pushing bottom end away so focuser end reaches my left hand, peek through focuser and so on
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Quote:Since Richard Simmonds is not known here
Quote:we both can't really adjust primary collimation screws while looking through focuser
Quote:Quote:we both can't really adjust primary collimation screws while looking through focuserYou do not have to. If you mentally marked which Hotspot/Triangle tip corresponds to which primary knobs then you can make the adjustment quick then reevaluate.
SteveCarpe NoctemBushnell 10x50 Seymour solarized binoculars.Bushnell 12x32 moon and terrestrial binoculars.Celestron: 102-GT Refractor OTA on a CG-4 GEMAstro-Tech Value Plössl 32mm, 20mmZhumell Z series 14.5mm, 9mm, 5mm+42° 18' 37.39", -122° 52' 3.76"
Never argue with a fool.Onlookers often can't tell the difference.
"My GOD, It's Full of Stars!" For the Obser: Atlas EQ-G w/moded SN8,JMI moto-focus, flocked tube,custom mirror cell.ED80 w/ACCUFocus,SSAG,DSI,EZ Guider. Modded Canon T1i,Pentax K-5II. For the field:14" Orion 14xxi,Flocked Tubes,Custom Paint,6 Fan Cooling,LED ground board lighting. Celestron CG5GT for film/digital photos w/EZ Guider, Atlas EQ-G w/an ES102ED/AT72 Piggy backed,EZ Guider. Various 1.25 & 2" Eyepieces.