Low cost B4 lens, what is it good for?, lenses available

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Kim Janson

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Low cost B4 lens, what is it good for?, lenses available

PostThu Feb 14, 2019 12:11 pm

We bough some lenses that we needed for our projects and got on the same patch plenty of lenses we do not need. These are old lenses of a big TV station. They have been used roughly, but kept well and front and rear elements look very clear, no scratches. Over all they appear to be in good working condition, but we have not fully tested them.

I will be doing some testing of them and post the videos here.

The first video is just some random shooting, the lens is Fujinon Pegasus III A14x8.5BERM-28, 1:1.7/8.5-119 mm with Fotodiox Pro B4 Magic BMPCC MkII B4 to MFT optical adapter.

This is with BMMCC, SA 180, ISO 800, manually controlling pan, tilt, zoom, focus and iris + 2x extender. At the start the 2x extender is on and f1.7



This is shot in Video mode and directly from the card to Vimeo. I think the image quality is quite usable at long end and when higher than f5.6 at wide end also. Not great but very versatile lens for the price. For sure plenty of problems with the image quality, but great for testing how you like to use B4 lens before being a more modern 4k or HD lens that can easily be 10 000 euro + and maybe even useful when used knowing the limitations of the lens.

The Fujino Vgrip A14x8.5 BEVM-28 and Pegasus III A14x8.5BERM-28 we have plenty and do not need, so we are selling them. They are 110 euro /125 USD each + fast shipping with DHL around 80 euro (depending where you are). Prices VAT 0%, relevant if you are from EU, for private buyers we need to add 24% VAT if in EU. outside EU and companies outside Finland VAT 0% .

We will verify that they are mechanically and optically ok (as expected for this kind of lenses and in line with the other similar lenses we have) and the Zoom works. Especially the Vgrips need some cleaning, that we will not do.

We have also some wide angle lenses, these we will inspect more carefully and agree the price when someone is interested, just contact me. They are Fujinon Vgrip and Agnus II 8.5x5.5 1:1.7 5.5-47 mm, electrical Zoom and Iris but not Focus.
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And some AT lenses (Fujino AT A15x8BERD-R28), if you are interested let me know and we will see fair price for them, but them we are not as eager to get rid off as they have full electrical iris, zoom and focus control that we need on our projects, few of them we can sell.

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Ps. If you are from Finland or visiting here, you are most welcome to visit us and to test and pick up the lens you want for a good price. And happy to demonstrate some pretty special gimbal systems too. We are located 30 minutes from Helsinki airport. http://levitezer.com/styled/
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Kim Janson

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Re: Low cost B4 lens, what is it good for?, lenses available

PostThu Feb 14, 2019 1:20 pm

This is the same lens (.Fujinon Pegasus III A14x8.5BERM-28, 1:1.7/8.5-119 mm ) and camera setup as above, but with a 3D printed no lens B4 to MFT adapter



There is bad vignetting at wide and of the zoom without extender, but with the in lens 2x extender it is gone.

On this video the Zoom is controlled using the electrical control.

All these lenses we have have this 12 pin connector

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The electrical Zoom requires just providing power for the lens. Such cables are available on eBay.

This is the 3D printed B4 to MFT adapter.
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It is not recommended and we do not provide it, just use for our internal testing. Such adapters are available form eBay.
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Kim Janson

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Re: Low cost B4 lens, what is it good for?, lenses available

PostThu Feb 14, 2019 2:38 pm

Random test shots with B4 lens, Fujino Vgrip a8.5x5.5BMV-28 1:17/5.5-47 mm with Fotodiox Pro B4 Magic BMPCC MkII B4 to MFT optical adapter.



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Kim Janson

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Re: Low cost B4 lens, what is it good for?, lenses available

PostThu Feb 14, 2019 6:43 pm

Looking for B4 to MFT adapter without lens, there is plenty, but is there some that should be avoided. Price would be the priority to match the low cost B4 lenses mentioned above (Fujino Vgrip A14x8.5 BEVM-28 and Pegasus III A14x8.5BERM-28 that have the 2 x extender)

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And the same question regarding power cables.

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Not that I would need them, but would be good to be able to point out low cost good solution.
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Kim Janson

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Re: Low cost B4 lens, what is it good for?, lenses available

PostFri Feb 15, 2019 2:19 pm

We will do a fast Iris check also on all lenses that everything moves smoothly. We could offer also Iris calibration with a small additional cost, just need to figure out the voltage levels the f-stops should correspond. How do you usually calibrate the Iris with such analogue B4 lenses?



viewtopic.php?f=4&t=86170

Though I am not sure these cheap lenses are worth the calibration, the auto Iris probably works just fine as they are, as long as the Iris runs smoothly and that we will check. If you receive a lens from us that does not have reasonably smooth electrical control of iris or zoom you can return it at our expense, money back or a replacement lens.
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Kim Janson

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Re: Low cost B4 lens, what is it good for?, lenses available

PostSat Feb 16, 2019 7:07 am

Useful information if you want to remote control a Fujinon B4 lens.

https://www.reddit.com/r/videography/co ... b4_lenses/

Note, the pinout must be verified as per lens.

We wil have also lenses that have handle removed, if you want to operate the lens just manually. This is as some of the lenses do not pass the iris and focus control test we do and the low cost lenses we will not fix.

Manual control f1.7 8.5-119 mm lens with 2 x extender, smooth iris, constant f-stop, parfocal, takes 77 mm filters, 70 euros :)

I quite like this setup otherwise too, everything easy at hand, electrical lens controls not needed.

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IMG_3814.jpg
IMG_3814.jpg (632.72 KiB) Viewed 436 times
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Kim Janson

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Re: Low cost B4 lens, what is it good for?, lenses available

PostSun Feb 17, 2019 4:11 pm

Just for fun, testing testing the above system, manual control only, Fujinon Pegasus III A14x8.5BERM-28, 1:1.7/8.5-119 mm with Fotodiox Pro B4 Magic BMPCC MkII B4 to MFT optical adapter on BMMCC. Mostly at 119 mm + 2x extender, resulting about 480 mm equivalent f 4 lens, this is enough to make the small objects disapare :)

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rick.lang

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Re: Low cost B4 lens, what is it good for?, lenses available

PostSun Feb 17, 2019 9:24 pm

Nicely illustrated, Kim.


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Kim Janson

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Re: Low cost B4 lens, what is it good for?, lenses available

PostMon Feb 18, 2019 6:10 am

Thanks Rick, These old B4 lenses are pretty wonderful. They are mechanically so accurate and nice to use and the zoom range is unheard of comparing to any other lens I have.
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