Photosbykev Posted December 17, 2011 Share Posted December 17, 2011 At last I manage to find some sun to play with even if it was behind some trees lol. These are the very first images taken through my Lyra Optic H-a (LOHA) 4" f/11 refractor with a DMK41 and 2.5x Powermate. The only image cropping has been done by Registax The 110mm D-ERF filter was taped to the front of the dew shield so there is still a lot of work to do but I'm very pleased with the first light images even if the focus is a bit marginal. Link to comment Share on other sites More sharing options...
Beyond_Vision Posted December 17, 2011 Share Posted December 17, 2011 A very nice set of first light images Kev RegardsKevin Link to comment Share on other sites More sharing options...
callisto Posted December 17, 2011 Share Posted December 17, 2011 Very nice indeed Link to comment Share on other sites More sharing options...
markt Posted December 17, 2011 Share Posted December 17, 2011 Really good views Kev! Link to comment Share on other sites More sharing options...
smerral Posted December 17, 2011 Share Posted December 17, 2011 Looking really promising! Link to comment Share on other sites More sharing options...
Montana Posted December 17, 2011 Share Posted December 17, 2011 Wow! big and very beautiful!Alexandra Link to comment Share on other sites More sharing options...
Dave Smith Posted December 17, 2011 Share Posted December 17, 2011 They look great. Is the visual view a good improvement?Dave Link to comment Share on other sites More sharing options...
Photosbykev Posted December 17, 2011 Author Share Posted December 17, 2011 They look great. Is the visual view a good improvement?DaveI didn't even check Dave, I just threw the DMK41 CCD camera on the back. Next time I'll put an eyepiece in and check. Looking at the live view from the CCD on my laptop there is a lot more to see. Link to comment Share on other sites More sharing options...
DaveK Posted December 17, 2011 Share Posted December 17, 2011 Great set of images. Link to comment Share on other sites More sharing options...
Psychobilly Posted December 17, 2011 Share Posted December 17, 2011 Nice first light with the modified scope Kev The only time I get to see the sun this time of year is when I am out in the car... Peter... Link to comment Share on other sites More sharing options...
johninderby Posted December 17, 2011 Share Posted December 17, 2011 Excellent first light images. Can't wait to see your images with the full stage 2 mod. I was surprised at the amount of improvement in sharpness and contrast with mine when going from the stage 1 to the stage 2.John Link to comment Share on other sites More sharing options...
Photosbykev Posted December 17, 2011 Author Share Posted December 17, 2011 Thank you John, it wouldn't have been possible without the great support that you and Ken have given me over the last couple of months. I've ordered the last Borg parts I need and I still need to design and make the front cell for the D-ERF Link to comment Share on other sites More sharing options...
johninderby Posted December 17, 2011 Share Posted December 17, 2011 If you'd like some closeup photos or measurements of the cell I got from TS to help with the design of your cell just let me know.John Link to comment Share on other sites More sharing options...
Photosbykev Posted December 17, 2011 Author Share Posted December 17, 2011 Thank you John, I'm sketching something up in Inventor now, if I hit a brickwall I'll shout Link to comment Share on other sites More sharing options...
Peter Drew Posted December 17, 2011 Share Posted December 17, 2011 Congratulations Kev, the visual should be wonderfull once the conditions improve. Link to comment Share on other sites More sharing options...
Merlin66 Posted December 17, 2011 Share Posted December 17, 2011 Well done!Looks like another successful mod!(If you think those images are good....just wait until you see the Stage 2 results!!) Link to comment Share on other sites More sharing options...
Photosbykev Posted December 18, 2011 Author Share Posted December 18, 2011 Did anyone notice a change of PST etalon tuning position before and after the Stage 1 modification?.Before I modded my PST my typical position on the tuning ring was about 5mm from one of the tuning ring end stops to get the optimum tuning.After the mod and for these first light images the tuning ring was on the end stop of the travel and possibly needed a bit more travel to find the peak.I've done the simple mod to change the range of tuning by moving the end stop by 2 holes and I'll see if I needed that bit more tuning range. Interesting to see that there was no anti-tamper label under the knurled rubber band. Link to comment Share on other sites More sharing options...
couleurblue Posted December 18, 2011 Share Posted December 18, 2011 Hi Kev, I too had to adjust the etalon tuning ring after stage 2 in the vixen 80 mod.The difference that it made was huge.......... Be careful with the helical focuser at stage 2. Ensure that it is well lubed on its inner core ..I used a very fine molybdenum grease...just a little..otherwise you may find that the weight of the diag/teleview and camera make it stiff and lumpy!!!!! Coming to a very fine focus on proms is still tough with these mods though.May bewith other scopes too.I guess that would be a function of seeing conditions mostly. Gordon. Link to comment Share on other sites More sharing options...
Photosbykev Posted December 18, 2011 Author Share Posted December 18, 2011 Thanks for the feedback Gordon, I managed to get a little time with the sun after resetting the etalon tuning ring it did make a difference so the 2 hole extra range I gave it was probably about right. Link to comment Share on other sites More sharing options...
couleurblue Posted December 18, 2011 Share Posted December 18, 2011 I might have sent a few pics of the vixen.Just in case,I will resend. The end of the scope was modified with an end plate,into whih a phospor bronzetube screwed which held an adapter to hold the etalon housing.This enabled fine movement of the etalon position within the 200mm inside focus of the 80mm. thus,very subtle changes to the ideal could be made. The etalon screwed tightly to the black adapter.Then the modifiedborg screwed onto the etalon housing.Again locking tightly. This allowed the etalon to be tuned in use,and the focuser to operate. Finally,but not shown in this pic,an adapter screwed into the rear of the Borg to hold and lock the BF10. Hope this helpsGordon. Link to comment Share on other sites More sharing options...
Photosbykev Posted December 18, 2011 Author Share Posted December 18, 2011 Cheers Gordon, I've gone a similar way except I shortened the main tube and refitted the crayford focuser before the ethalon. PST Solarscope Modifications PhotosbyKev Link to comment Share on other sites More sharing options...
couleurblue Posted December 18, 2011 Share Posted December 18, 2011 PPS. To achieve focus with various cameras,the adapter holding the BF10 had to be capable of increasing/shortening the overall length of the optical train from the etalonto the ccd array and via a televiewto ccd array...this was achieved with a screw tube into the borg rear and a very narrow locking ring. Link to comment Share on other sites More sharing options...
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