Vulisha

Hi vlaiv, thanks on your response, so I see, too big of a second mirror and it would be like f10 and there would be vignetting on full frame ir even aps c. Well I have EQ5 with belt onstep, rms is ~1-2 arcsec. So additional weight, and longer FL is not best combination I beleive. Currently I have 130p heritage that has overpolished mirror and I lose some details there. I have nice small 330/61 APO for wide field. So 130 pds would be bigger(optically better) version of heritage but I would need coma corrector, that could be hit and miss as is my OVL FF for APO that is not flatting enough , while i do not need anything for RC and it is inexpensive. 127 mak is a bit heavy and i would need correction as well? together with 1500 fl i do not think my mount would be able to handle those 5 mins. Maybe 102 mak as last resort? Regarding cameras I own 550D and Rpi High Quality camera, hardware binned to 2x (1.55->3.1um px)

Is there any plan having 5" RC? I am in a hunt for a cheap 5" f~8 telescope for capturing galaxies and planetary nebulas. RC design seems to be ideal, but 6"is a bit too big for my setup, and m, closet, so I would prefer something smaller. Or some different type of telescope I should watch out for? Celestron C5 STC is s bit too high in price. And maks are too slow, and not best solution for galaxies. Any ideas?

I had to UNcheck Use scale, then it started working... Also had to reset some settings to defaults

Isn't it a time to rant again I was just looking for scopes and saw same issue, why o why is SCT so expensive. I prefer it over a mak due to weight and imaging potential. Also got me wandering around, why is celestron only one producing cheap STCs? Patent limitations? Deal in company? You can find ton of MAKs, EDs not to mention newton's but STCs are like celestron exclusive. Any reason for that? Or I am missing something?

OK i had this same issue with OnStep Mount , and Onstep has pretty good guide, there additional links provided by Khalid. https://onstep.groups.io/g/main/topic/84875509#36367 Usually main issue is thst raspberrypi has GPSD (D as Deamon-indeed Deamon, that hoggs all usb ports) So easiest solutiom is to disable it completely.

You sure about that 😅 I changed camera to svbony sv105 3um pix on 1920x1080. and now I got this messed up errors, could it be that my belts are not tight enough so it results in this mess? Or something else? I doubt it is balancing since scope and counterweights together have around 4kg on EQ5, But my counter weights are "hanging" (4x0.5kg weightlifting counterweights as original eq5 is too heavy for this small scope)

I found this details it seems. maximum when modded EQ5 can go down to 0.6" when modded by pro, to 1.8" when modded at home and and not modded it is around 8". Mine is modded by me so 4" seems possible and probablee

Yes indeed I did use binning(i think x2)! What resolution that gives? I entered proper FL and PHD got proper pixel size from INDI. As this is on RaspberryPi screen I cannot see is it ' or " either, it might be any but I would see big strikes on image then with so much' error. If I used 60/330 as guide what would then my resolution be? I would like to know RMS and fix my belt or worm if needed to set everything up properly so I don't waste precious night on dark spot

Hi Vlaiv, I am using raspberry Pi HQ camera as a guidecamera and I used Antares as guidestar and I tried with Saturn as well, I am not sure is this from Saturn or Antares, but I believe this one is from Saturn although Antares was similar but disappeared into the night, so pretty bright targets. Pixel size iz 1.55 and resolution is 4056x3040 Pictures are good, but due to high LP on current location I use short exposures (30sec), so it would probably be good even without guiding, and since I still do not have Bathinov I missed focus a bit, but I want to be ready for dark locations. See I thought it might be 0.49' as that would be bad but more realistic. I do have Svbony SV105 and and logitech C270 but I did not aim at any star(or planet) with them, HQ cam is much more sensitive. Tonight is cloudy so I cannot test with 1s but I will test that as well, and results with 1s I can consider as realistic?

Hi, I know it is old tread but fits a bill I got custom 60330 telescope on EQ5 with OnStep and 35/135 guider on -20dec in south. This are my results from phd2, this is my first guiding, and now I am not sure due to bad resolution, is this 0.49' or 0.49" error so is it good or it is bad? Can it be better and does it need to be better?

Well in the end I think I decided to go woth worse but "safe" choice: Evostsr 72. While there will be for sure blue bloating, the main choice reason is that evostar is available now and TS optics wont be for minimum of 30 days, and in case of need evostar will have higher resell value, and I will be able to replace it easier. I also read that you can have blue bloating on fpl53 triplet and not have it on 51 doublet. Many factors come in play there not only type of glass. In the end 80mm fpl53 will stay distant wish and will maybe come one day, but limited data and availability made me stay away for now. Money is here now and it is itching me to be spent

What would be equivalent 80mm in FLO? Mind you that I would need to pay import taxes from UK as well as I am based in EU. Thanks on the tip about Astro Tech and Altair as equivalents.

I asked mod to transfer thread, thanks on the tip. Well I have no doubt that triplet is much better, as it is pricewise . I indeed did found a lot of triplet images, and they are brilliant, but I did not find any 80mm F7 fpl53 doublet images.

Since it seems there is not a lot of experience with 80mm TS Optics I think I will go safe route and go for Evostar 72 with OVL flattener but will think about it a bit more.

This looks brilliant indeed! there is small amount of blue on right halfes of brightest stars but it is barely noticable, and much better than refular 80ed. Do you mind me asking what FF you used for this, as stars are spot on all around?

Hi all, I am having trouble finding images and reviews for this two doublet scopes https://www.teleskop-express.de/shop/product_info.php/language/en/info/p7169_TS-Optics-ED-APO-80-mm-f-7-Refraktor-mit-2-5--R-P-Okularauszug.html And https://www.teleskop-express.de/shop/product_info.php/info/p8637_TS-Optics-Doublet-SD-APO-80mm-f-7---FPL-53---Lanthan-Objective.html Third option would be SW evostar 72, and there is more than enough data for that. Does anyone have them, and even better, some images captured with 80? I am even able to find images for 102 but not for 80. As @vlaiv pointed out to me in PMs cheaper one is basically same model as Altair Starwave ASCENT F7. But again hard to find data for 80

Oh that's the trick, i didn't know it was iOS was searching on Android and Google

I am unable to find spiral cam 2, can you share link or more info

Ooohh so you are the guilty ones for this brilliant website Thanks FLO!

Well not with iPhone but I did use OnePlus 5t while ago for same target. Check does your phone have RAW capturing, take few exposures and stack it with Sequator and you will get even more impressive results. Best of luck!

Hi Vlaiv I did something similar with my phone OnePlus 5T it supports camera2api but not fully. There is also apo currently in development DeepSkyCamera thst should5 be able to take longer exposure images, bit my phone does not support exposute longer than 1 second outside main camera app for something reason. So capturing was solved using Mini Mouse Macro software to repeat clicks with teamviewer on PC + teamviewer quick support on phone. You could additionally add sharpcap to stack from directory (pro version supports) andtry using DeepSkyCamera to bypass teamviewer hack. There is pro version planned ad well, and it looks promising: Here is one result.

That is good option. Take chrome washer to prevent rust and new dents, I don't think silver color will shine too much to worsen seeing.

Well I would say this is not bad result at all So Heritage 130p, 3x barlow, eos M, best 2% out of 15000 frames pipp, registax, ps cs2, cropped and enlarged a bit I did a lot of collimation and adjusting to achieve this as mentioned in thread before and I think this is maximum I can get with the current equipment regarding raw data, probably could do more with better processing.

Thanks Infinity/Nicolàs! It could use a bit more fine tuning but it is pretty well now. Also what software do you use to split image I struggle with Photoshop. I have managed to see dark spot on Mars, untill now it was just a blurry glowy ball, and seeing is disaster these days. I did try to image Mars as well but my camera somehow corrupted 2/3 4gig raw video files so I did not get any results Toll that was much of help was Al Coli Aid: https://stargazerslounge.com/topic/232508-collimation-help/ It is available here on forum for download. I used simple colimation cap, phone holder, and my phone with DroidCam app. Nothing else. I made big circle to match colimation cap hole, small circle to match secondary and + to match primary middle mark. It helped a lot to be able to work and see results on monitor directly.

I think I nailed it now! it was not an easy work but I managed by adding washers, distancers, bending holder a bit and colimating a few days.