IDAS Winter Special Sale

•December 14, 2018 • Leave a Comment

From now on, all of IDAS filters are on sale. This is the worldwide special event. So contact your local IDAS dealers for more details.

idas sale

Don’t miss this great opportunity!!




•December 11, 2018 • 2 Comments

Auriga is one of my favorite constellations. 420mm f.l. seemed to be a bit too long to fully cover the core of that. 645 sensor must be perfect.


BORG 107FL F3.9ED + Cooled 6D + IDAS LPS-V4-52, 20 x 3′ @ISO 2000 dithered by SS-one KODO/EM10


Comet 46P thru IDAS LPS-V4 Filter & Big Dipper through Hinode Bino

•December 10, 2018 • Leave a Comment

The comet was nice view thru binoculars. It looked large fuzzy balloon. But I wonder how I can describe photographically. So first I was more curious how two results showed up through different filters. I compared between HEUIBII and LPS-V4. HEUIBII was needed as UV/IR blocker since my camera doesn’t block.

LPS-V4 was usually called “nebula filter”. But it was also known as designed for passing comet’s C2 spectrum as well while darkens the background. Here is the result of each single shot. I tried to set both background color and brightness similar. And only applied Levels and Curves by similar ways. No dark and flat applied.


BORG 107FL F3.9ED + cooled 6D + HEUIBII/ISO1600/1 x 30″


All same as the above except ISO. ISO6400.

Above two images show up quite differently. These are more than what I anticipated. Believe or not, both image scales are identical. Not cropped at all.

I didn’t want to extend the exposure time. So I increased ISO thru LPS-V4 instead. The comet gas is more spread out and greenish. Meanwhile HEUIBII is smaller and more bluish. I could increase ISO with HEUIBII. But I wonder how much effective. The background should be just brighter too. LPS-V4 allows to increase ISO while keeping background level down.  Probably this should be more evident if the sky is more light polluted or the comet is close to the horizon (usually so). As one of LPS-V4 users – Klaus Brasch did, LPS-V4 should be very effective for the comets.

I took multiple shots. But I’m not sure I will continue the further image processing……

Meanwhile I didn’t expect the visual was more impressive than imaging. So I didn’t prepare two LPS-V4s for binoculars. Probably I could see higher contrast comet view. I will try when I have the another chance, this weekend?

I also enjoyed with Hinode Bino too. This was first time I took it to the dark site. Following are my favorite Binos – Hinode and Canon 3 brothers.


Canon 8x42L. This is so far the best binocular for me optically and mechanically. Image-stabilizer performs very well. Yes, expensive. But for me it’s quite reasonable value for life-time enjoyment.

And my new cute companion – Hinode Super Bino. I enjoyed Orion and Big Dipper first time. Especially Big Dipper is gorgeous. Its 7 stars are fully filled in entire my eyes. It was exactly like


Inner circle is 24-degree while outer is 30.

To Hinode users, try to see Big Dipper if you don’t look at yet. This is the must-see target through Hinode bino. I bet you will be overwhelmed at its view. Enjoy with Hinode!!





Comet 46P/Wirtanen

•December 6, 2018 • Leave a Comment

I got a latest comet image from Klaus Brasch, which was taken Dec/5th. 

Here is another image of Comet 46P/Wirtanen I obtained last night under much better sky transparency as well as reduced sky glow. The same TMB-92 f/5.5 refractor was used in combination with a Hutech modified Canon 6D Mark II camera and an IDAS LPS V4 filter. It really is a most impressive comet both in binoculars and through a telescope, since the coma is about as large as the full moon appears to the naked eye. No obvious tail was visible, however, nor prominent in my image other than a slight pink colored extension from the comet’s nucleus.

Thanks for sharing, Klaus. I didn’t know the nucleus is as large full moon. This weekend looks good chance for me to see too.   

SS-one KODO-Losmandy & -Takahashi PM Mounts, And SpaceX

•December 5, 2018 • Leave a Comment

My friend and a genuine engineer – Jim, as Hinode solar guider developer, made a following prototype for Losmandy mounts and I tested last night. Everything looked as expected. He always did what exactly he planned, and made it professionally. Mr.perfection unlike me.

1205aSo we started arranging all of necessary parts for commercial products, including the custom PCB. This box converts KODO’s DB15 to Losmandy’s original RJ interfaces for original motors. So users can simply setup like Losmandy original control box.

Features ;

  • Max 32x slew speed
  • GOTO from KODO or from SkySafari
  • Dithered imaging with DSLR (any brands including SONY A7 series)
  • Electric polar alignment


I’m expecting I can start offering Losmandy-KODO solution sometime next month. 32x slew speed might not be the favorite level. But I think it is still practical to manually point to a closest star, press sync and move to the target.

With a similar conversion box, this concept allows to do for Takahashi PM-1 and PM-SP mounts with KODO by changing motor parameters. It will be commercially available in similar schedule.

BTW, if someone missed watching this SapceX accomplishment yesterday,  see this video.

1st stage landing scene is something like I’m watching the real version of Thunderbird 1 rocket. 3rd successful landing, wow!! Really great American engineering!!

And 64 satellites or something else?? Anyway, what lift-up power!!

New Masuyama Eyepiece

•December 4, 2018 • Leave a Comment

A new 1.25″ eyepiece is added in Masuyama lineup. This is 2nd 1.25″ eyepiece.

  • 10mm
  • 85-degree AFOV
  • 6.5mm eye relief
  • 100g
  • FMC
  • $199.00

It comes in stock soon.


BORG 55FL F3.6 with Filter Box & IDAS Filters

•December 3, 2018 • 1 Comment

This is the Series 80 standard focuser version. In addition to FTF sets, R&P focuser version is now commercially available as well. US price is $1,450.00

After using both focusers myself, I concluded –  if I don’t need a motor, R&P just good enough. Very smooth and precise. 1/10 reduction allowed me to fully control focusing manually. The cost is below half of FTF. So I highly recommend this set unless  you control the focuser from PC.


Sunrise Blue


Sunset Orange



BTW, I realized I didn’t use ASI 183MC for a while.  So I set a camera with 55. The sensor size is 1/2.7 of full frame.  Looks like it will be similar FOV in full frame at 540mm f.l. And both are quite similar number of pixels.

I originally bought this camera for small galaxies as a resolution killer. So generally this is the spring season camera for me. Anyway, since a camera doesn’t block IR, we have to consider where and how filter(s) is/are set in the optical train. BORG filter box – 7519 is a convenient tool. It allows to set up to 52mm filter. So large enough for full frame sensor camera as well.


Easy to swap filters shown above, depending on the targets and sky conditions. Also thanks for BORG’s smart mechanical designs. There are some other filter threads in optical train shown below. One for in front of reducer. Another is at inside 7522. These will be useful as a base filter location like a regular UV/IR blocking, if you don’t have to switch a filter. Also two-stacking filters take you to the new world, which gives you more fun for imaging even with OSC camera as well.


IDAS plans to release some new filters within a couple of months. Please stay tuned here. Those should be very attractive for you.







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