•March 10, 2014 • Leave a Comment
One of common questions on Hinode is its ability of the guiding accuracy. As you know, it is very hard to describe scientifically because of greatly depending on other factors such as mount’s backlash, accuracy of polar alignment, air turbulence(probably this should be major factor) and hardware’s differential flexure etc.
Instead, describing the minimal detection value to the moving object at lab should make sense and more realistic.
Hinode can detect position errors on the order of 1 arc second with a lab light source, and that the smallest correction it will make is 100ms, which corresponds to 1.5 arc seconds at 2x(1x) guide rate and 0.75 arc seconds at 0.5x guide rate.
We will add this lab data at the Hinode page.
Also following is the recent video uploaded. This video shows the image scale 10 arc minutes vertically during 3 hours. Keep in mind this was done with a stocked Celestron AVX mount, and point the mount to the north without using any device. Just guess setting by eye.
•March 10, 2014 • Leave a Comment
I start receiving more feedback on Hinode SG these days. This is one of them sent from Ha solar expert – Jim Lafferty, well known as “Shogun’s Sky”.
[Click for his more pictures and his web site]
Taken with Lunt 100, G11 and DMK41 while guided by Hinode SG.
Very good to know all Hinode SGs shipped are working as expected and designed. Enjoy solar astronomy with this convenient device.
•March 6, 2014 • Leave a Comment
Thanks for the feedback and suggestion from monochrome camera users. We have decided to continue to reproduce P2 filters in following sizes.
(previous production lot shown)
With frame : M28.6, M48 and M52
No frame : 31mm, 36mm and 50mm (3.0mm thick)
They will be available from early of April.
•March 5, 2014 • Leave a Comment
IDAS UV filter (part # UV372-80) is now available.
Response curve (actually measured)
Optical density (actually measured)
This filter should be very useful for enhancing the visibility of Mars’s atmospheric water vapor clouds as well as increasing the contrast of Venus’s lower atmosphere cloud structures. Keep in mind, this filter is well designed to minimize transmission leak in VIS and IR very much. Surprisingly OD 8 to 9 in VIS region!! Probably I can say virtually no leak. As a result, it creates extremely high contrast image.
This UV filter also works for special scientific imaging such as plants, insects and human skins as well as forensic research.
Two sizes – M52 and M28.6 are available.
UV372-80-286 : $309.00
UV372-80-52 : $309.00
As always, IDAS filters are all well made. I believe this should be the best UV filter currently available in the market.
•March 5, 2014 • 1 Comment
Gakken, a giant of educational kit provider in Japan has introduced the unique spherical projector, called “WorldEye”.
When projected in the dark room, the Jupiter and the moon look like floating around the air. It’s very cool. I’m so impressed. So I wanted to try to share with you. My PV doesn’t look like professional grade like Gakken’s though.
WorldEye will be available worldwide soon. USB and HDMI interfaces are very nice, which allow to enjoy user’s original video and time lapse movie.
I will show more movie at this blog.
•February 27, 2014 • 1 Comment
Now 3 different mounting bases are available as standard accessories. Specify the one of them on order.
They can be purchased separately too.
•February 24, 2014 • Leave a Comment
Japanese people enjoy the party under blossom, especially plum(or Japanese apricot?) and cherry. These are taken with BORG 50/F2.8 and Sony Alpha 7R. All are not cropped.
[俳句(Haiku)] 5+7+5 character poem
This lens is expected to be released this summer. Looking very good color contrast entire full frame sensor.
67FL + Fuji X-T1
All are taken in X-T1 Velvia mode
Mejiro – Japanese white-eye and Ume(Japanese apricot) are the typical combination from long-time ago.