•October 2, 2015 • Leave a Comment
I was field-testing a recently released 10×30 IS II while comparing with a legendary 10x42L.
I already got an another new model – 12×36 IS III. But it was currently loaned to a friend of mine. The quality of 10×30 and 10x42L look very close. I feel 10×42 looks a bit more sharp and cleaner though. Personally I wish to be because its price was 4 to 5 time more expensive. Anyway overall performance of 10×30 is very close to 10x42L. 10×30 shows very flat image field like 10x42L. That was one of major reasons why I loved Canon binoculars. 10×30 is same as expected. Stars shows very good shape entire FOV. It was very pleasing view. Although it might be a little small aperture for the deepsky, I’m confident it should be perfect for solar and lunar viewing. And probably good for mountain hikers because of size and weight.
Only one negative feeling although this might be very personal favorite. We have to keep pressing 10×30 IS button while doesn’t 10×42. Continuously pressing is not comfortable at least to me. But probably this should be the intention to decrease battery consumption as much as possible. It’s very minor issue anyway.
Canon new binoculars are still great optically and mechanically like 10x42L. Superb products. I applaud Canon has achieved maintaining same quality while reducing the production cost, still at Japan’s factory.
•October 1, 2015 • Leave a Comment
I saw large spot group these a couple of days. So I wanted to take a picture. A bit too late though…..
IDAS 82mm broadband solar filter + BORG 89ED + ASI174MM
•September 30, 2015 • Leave a Comment
Here is 7-hours solar activity today. Unfortunately there is still the heat wave from the ground though.
I’m now working the new project for the Japanese-made high quality achromat lenses, which will fit BORG series 80 tube assembly and be suitable as solar scopes. Probably one of them will be a proper guide scope for users who are looking for larger aperture and longer focal length too. I will disclose more details here later on.
•September 28, 2015 • Leave a Comment
I built up 90FL bino with new Series 80 rings(=part # 7085, much lighter than previous ones). The view through BORG 125SD bino was spectacular and unforgettable. But it was a bit too heavy and bulky for myself. And naturally it requires steady and heavy mount and tripod. BORG 90FL bino including the platform weighs only 13 lbs. It is quite easy to carry and comfortable overall size. It didn’t take 10 minutes for the initial platform collimation setup. Now two optical axes are perfectly matched. And ready for astro viewing.
90FL bino and EMS erecting mirror diagonals with 1.25″ helical focuser. Only 13 lbs!!
IDAS 82mm Broadband Solar filters in front
Hinode SG is just used as the sun pointer. Night time I can just switch to conventional finder bracket.
I’m sure this will be visual setup for next year’s Mercury transit
This optical system showed me very clean and sharp sun spots today. Very nice view!!
•September 21, 2015 • Leave a Comment
This was 7 hours sequence last Friday. When I saw the prominence first during focusing, I expected the big activity . But unfortunately not much actually. No body knows when we start shooting. That might be fun anyway.
•September 16, 2015 • Leave a Comment
Finally I received the long-waiting 10×30 and 12×36 binoculars.
I still own 10x42L model. It’s great optically and mechanically. But it’s a bit heavy and bulky. These new models are much lighter and more compact. So I thought they should be good for solar viewing. I start playing it around. As expected, image was very clean and good color contrast. IS looks strongly working. IS allowed me to read small characters I couldn’t figure out when IS was OFF. This is why I can’t go back to use the conventional binoculars without IS function any more.
Now we will start studying how to attach IDAS high-quality solar filter since these models have no threads in front. I felt 42 mm aperture was a bit too bright for my eye through the filters. (The brightness was perfect through telescopes) So 30 mm or 36 mm aperture might be the proper sizes for solar viewing. We will see.
•September 15, 2015 • Leave a Comment
This was my 2nd shot last Sunday. Since last month I didn’t pay attention Sh2-235? and Sh2-231?, composing was not something favored. So I re-tried.
BORG 55FL F3.6 (with prototype reducer) + Cooled 6D at ISO 2000, 13 x 3 minutes
I compared this picture with last month one. Nebulosity sections in this picture looks smoother although imaging methods are different. I’m sure sensor cooling and dithering should be big factor for that.
This month : Cooled 6D, 13 x 3 minutes at ISO 2000 and LPS-V4 filter, dithering
Last month : SONY(no filter), 16 x 3 minutes at ISO 1000 and HEUIBII filter, non-dithering
I selected LPS-V4 last Sunday because I felt the sky was a bit hazy and bright. The sky condition was different. But last month was more favor because of more transparent.
Anyway, it’s fun to see there are various different nebulae and clusters in one frame.