Another Solar Animation & LPS-D1 for Nikon

•May 14, 2019 • Leave a Comment

1- This is an another animation from Chris Barr. The same original image source taken on Cinco de Mayo and re-processed for the prominence version. Nice!

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2- Now IDAS LPS-D1 for Nikon APS-C are in stock.

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The frame for D5300 & D5500

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Canon Fluorite for UV

•May 13, 2019 • Leave a Comment

The fluorite element is well known as high transmission in wide range of the wavelength. After talking with some institute today, I thought I wanted to share Canon data with you here. Generally conventional silicon-based sensor is not as sensitive in UV as in NIR.  So optical’s transmission is the key for the success of UV imaging.

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Moreover BORG scope has only one mating element. So I believe BORG fluorite scope is one of highest overall transmission in UV as the optical system commercially available in the market.

And this should be quite suitable system, which allows you to use 250mm telephoto lens.

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Adding extension tubes more and more, you can use it as macro lens too.

And IDAS has high quality UV filter (#UV372-80).  Unfortunately 52mm has been sold out though.

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Unlike other brands’ UV filter, IDAS one has virtually no light leak in NIR. So this filter allows for true UV imaging.

Solar Animation

•May 10, 2019 • Leave a Comment

This is a really great animation produced by a recent Hinode SG user – Chris Barr. This sequence looks showing about 90 minute period of the solar activity. Let’s enjoy watching.

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More details on the imaging background written by Chris;

I’m slow but purposeful.  I finally had a confluence of time, weather, and target on Sunday for some guided solar imaging on the Mach 1.  I mounted the  Hinode on a 3″ ADM V-rail attached to the forward ring on my Lunt LS100THa.  I would have thought this configuration would yield close alignment of the two light paths but alas, it was not the case.  So after some shimming of the ADM rail I manage to get them sufficiently aligned.  From there I was able to use a prior stored calibration from an earlier low yield session with the Mach 1/Hinode combo and guiding was a piece of cake.  AR2740 has come around the limb for a second engagement so I was quite excited to have an active Sun for a change.  I set up an autorun sequence on FireCapture for 500 frames every 90 seconds.  I also had the Airylab SSM managing the captures for best seeing.  I managed to trim the hedge and knock two items off the honey-do list whilst capturing 26 videos over about 1:40.  I’m pleased to say there wasn’t a single bad video, all keepers.  The system worked flawlessly.
If I am to make any critique at all it is that the autoguider cable included with the Hinode is a tad short.  I could use another 18″ comfortably.  What is the cable spec?
Here’s my resulting animation.  https://astrob.in/404775/0/
A couple more points.  The proms and surface are captured in a single exposure.  I guess we’ll chalk that up to dim proms.  Sure does save time and yields a much nicer limb IMHO.  Another benefit of this combined with the Hinode is that Photoshop managed to autoalign the frames while loading them into the video sequence.  That was a first for me.  What a time saver!!  I suspect if I were shooting just proms with the surface blown out PS autoalign would not have worked despite the Hinode-induced uniformity but I’m anxious to try it anyway.
Cheers,
Chris
——-
Chris, it’s really fun to keep watching your animation repeatedly again and again. Very nice finish. It should be a scientific textbook value. Congratulation!!
I’m looking forward to seeing more your animations. The sun should be the object we can enjoy watching in the movie.
And Hinode SG will be useful for several solar events too.
Finally, to the customers who are currently waiting for Hinode SG, I’m sure we can notify the shipment notice sometime soon. Thanks for your patience.

IDAS NB1, 2 & 3

•May 9, 2019 • Leave a Comment

NB2-3-ODW

Now 3 different Nebula Boosters are available from IDAS. I thought some people might be confused at each performance. This is to summarize that.

comparison

Note the basic concept for NB2 and 3 is to enjoy using various filters for a same target and post-processing with various de-bayering or blending techniques. So 52mm NB2 and NB3 are basically intended to be set into a filter box.

Followings are Canon R(P) drop-in filters.

NB2-NB3-ODW-DPR

Again, this is the same concept, which allows to switch multiple filters time to time. Each filter is par-focal with Canon original ones. So no light path issue. This system allows to use Canon EF or EF-compatible wide-angle lenses. So it should be very useful for boosting Milky-way’s nebulae and blending with regular RGB colors.

If someone are looking for the solution how to use a wide-angle lens and ZWO cameras thru filters, this is one of ideas. But a filter should be NB1 or LPSs etc alone.

https://digiborg.wordpress.com/2019/01/29/mirrorless-zwo-qhy-camera-adapters/

 

IDAS Nebula Booster #2 and #3

•May 8, 2019 • Leave a Comment

IDAS NB2 and ODW filters are expected to come in stock next week. (NB3 will be later) Each US price is as follows;

  • NB2-52 : $219.00
  • NB3-52 : $219.00
  • ODW-52 : $89.00

Each is only available at 52mm. No plan for other sizes as regular round-mounted.

This is IDAS’s new filtering “system” for one-shot color cameras to maximize the nebula emission’s S/N while capturing regular RGB broadband colors without re-focusing or taking apart the optical system during imaging session.

While NB1 performs alone, NB2 and 3 requires a base filter since they don’t block NIR themselves. But don’t be disappointed. I explain why…. Following is one example.

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Base filter : NGS1 is the best match with NB2 and 3. But regular UV/IR blocking filter may be used too. IDAS LPS or NGS has still good advantage if the sky is light-polluted.

  1. For regular RGB color : ODW (as FMC full spectrum filter)
  2. For narrow-band nabula : NB2 or NB3

And blending in post processing.

OLYMPUS DIGITAL CAMERA

Conventional 48mm UV/IR blocking filters can be set with 52-48 stepping ring as a base filter. But be sure Hutech adapters (for M42 for APS-C or smaller and M54 for full frame cameras) are optimized for IDAS filter thickness. You need to adjust the mechanical distance when non-IDAS filters are in place.

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NB2 for OIII, Ha and NII

NB3 for OIII and SII

Again, as always, each emission line is intentionally set at shorter wavelength side and the transmission peak is the flat-top shape to minimizing signal loss after the spectrum shift. Very well designed as usual.

IDAS LPS-D2-48 & BORG 107FL Bino

•May 7, 2019 • Leave a Comment

LPS-D2 48mm was unfortunately out of stock for a while. But now new lot is coming up and we are scheduling to resume shipping 48mm next week.

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So now what available are

  • 48mm and 52mm
  • For Canon APS-C
  • For Canon 6D
  • For Canon R & RP

Seems to me now more people are choosing LPS-D2 over LPS-D1. So the sky must be  more affected by white LED every where these days.

Thanks to the customers who have been patiently waiting for. You should be notified shortly.

I saw a beautiful BORG 107FL/EMS setup at Matsumoto san’s site.

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He made own large tubes and completely fixed them with the bracket to eliminate collimation concern. Instead, he uses Matsumoto san proprietary’s built-in helicoid EMS to adjust the inter-pupillary. That is an another great concept too.

And I noticed he is using a pair of Nikon 2″ eyepieces. Too gorgeous!!

I’m sure Japan is the largest BINO market so far because of Matsumoto san’s long-term efforts and supports.  I feel China will be 2nd soon since there are so many numbers of serious visual observers there. They already knew how twin-scope viewing was so great and ultimate.

 

Attn BORG 7108 Users & Takahashi PM-1

•May 6, 2019 • 1 Comment

BORG 7108 is well designed as multi 1.08x field flattener. But one of most common questions were how to set a filter with 7108. It was a bit challenging. Recently I has realized it has 40.5mm filter thread(!!) in front of the lens barrel. See below.

7108

If you are looking for the filter solution with your 7108, get a 40.5 – 48 (or 52) step-up ring, so that you can set 48mm or 52mm filter in front of 7108.

Keep in mind, 52mm filter frame is a bit larger than 2″ focuser’s drawtube inside. You have to add an extension tube (if your system has extra inward room) to avoid interference. BORG 7835 – 2.7″ helical focuser or larger ones are OK.

As I announced, Takahashi PM series have been discontinued. No stock any more either. That’s sad since I receive very positive feedback from all of PM-1 users. Yes, I fully agree. I like PM-1.

Finally I completed PM-1 setup after adding 2nd counterweight. A cooled 6D was too heavy to use with. Probably this setup with 2 counter-weights should allow to use with 90FL F4 if a camera is not heavy.

OLYMPUS DIGITAL CAMERA

This allows for the precision electric polar alignment and dithered imaging. Tak original polar scope was well set at the factory. But my old eye makes harder and harder. Since the polar alignment is precise, I don’t think I need DEC correction except dithering in this focal length.

One of my favorites is the mounting coupler, which allows me for quick set-n-release.

 

 

 

 
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