Monday, 1 December 2014

Some comments from users of the V1-F1A flash adapter

I receive a lot of mail and comments from users spread out in many countries. I took the liberty to compile some of those comments extracted from the mails. I translated the Danish to English but otherwise not changed anything.

If you are interested in this adapter and want to see more detail then just follow this link:

Comments from USA

"Thank you very much. It's a very nice solid fit. Just thought you might like to know I was also able to sync my flash with a Yongnuo 2.4 Ghz popper at 1/400 with no banding."

"I applaud you on what you managed to do in creating the V1-F1A."

Comments from Denmark

"Den adapter gør det meget nemmere at sætte en radiotrigger til studio flashes på. Det er fantastisk, at du har gjort det store arbejde. Tusind tak for adapteren!!!"

"SB-700 og sync kabel. Virker perfekt op til 1/400 med mekanisk lukker. Yongnuo RF-602 med speedlights sync’er op til 1/200 mekanisk. Elinchrom studio flashes med Elinchrom trigger sync’er op til 1/250 men har først fuld lysstyrke fra 1/200 og langsommere. Det er det samme når jeg trigger dem optisk. Så alt er helt fint, som det skal være."

Translated to English:

The adapter makes it much easier to put a radio trigger on the camera for studio flashes. It's great that you've done the hard work. Thanks for the adapter!!!

SB-700 and sync cable works perfect up to 1/400 with mechanical shutter. YONGNUO RF-602 Speedlights sync up to 1/200 mechanically. Elinchrom studio flashes with Elinchrom trigger sync up to 1/250 but reaches first full brightness from 1/200 and slower. It's the same when I trigger them optically. So everything is just fine as it should be.

Comments from Poland

"It's awesome that I found your video on Youtube."

The two video he is referring to are these two, in case you have not seen them.


Comments from Spain

"Everything perfect. I've tested and works great.
Thanks for everything."

Comments from Italy

"I wanted to warn you that the material has arrived in perfect condition, and very well made.
I remain convinced that in any case you've been really good at thinking and realized this adapter. Thanks again. I wanted to tell you that you have been really great to create this adapter, no big brand accessories has designed it, and have found it really salvation."

Comments from UK

"I did indeed sort out the issue and it was one of config settings on the Pocket Wizards Mini TT1 - Flex TT5. These units can be programmed with 2 switchable profiles so now I have one for TTL when using Nikon speed lights and the other is a pure trigger."

"Once again many thanks for your prompt service and support."

Monday, 24 November 2014

Almost all the adapters are sold...

Since I sold all the readily made adapters and since quite a lot of people are interested in buying this, I decided to assemble all the adapters I had parts for. This was last week... Now I have only one ready to be delivered and have parts for two more. That's all. After these three I will not make more of these until I have finished my next project, a CNC which I am in the process of building partially for the purpose of making these adapters and similar, unusual things or equipment you can't find elsewhere.

So, keep tuned in and follow my projects. In the meantime, three more people can buy the V1-F1A already this year, the rest of you must wait and hope that my CNC will work as I expect it. I will keep you informed here about the CNC project status as well, as soon as I have time, I will write about it.

Anyway, so far so good, I have all the electronics ready and tuned, have all the motors which I will use and almost all the mechanical parts needed, so the works has not just started, it was ongoing since over a year now.

If you are interested to buy the V1-F1A adapter then follow this link for the details:

Thursday, 6 November 2014

Possible shutter speeds when using the V1-F1A flash adapter

If you are using the V1-F1A flash adapter it is important to know the maximum usable shutter speed. Going outside the limits may result in a black band (shading). Since the camera is not recognizing the flash it has no idea about how to handle it. The V1-F1A adapter allows you to select any shutter speed so it is up to the user to select the one which is suitable for the situation. Setting too low shutter speed may result in motion blur, setting too high may result in black band. How large that band is depends on the shutter speed, the higher the shutter speed above the maximum usable the wider the black band.

Additionally, the electronic shutter behaves different from the mechanical shutter, not only in terms of maximum shutter speed, but also in terms of shutter movement. The shutter blades move the opposite direction, from the bottom up, as opposed to the electronic shutter, which emulates the mechanical but with a movement from the top down to the bottom of the image. This is clearly visible in flash images taken with shutter speeds above the maximum usable shutter speed.

The above is demonstrated in the following images. I used the V1-F1A adapter on the Nikon V1 which triggered an Olympus T32 flash in a grip, as seen in the image to the right. The grip is necessary because the flash is too heavy, so it is not suitable for direct use in the adapter. The test images are taken from about two meters and the test subject is a full size Venetian mask on a white wall.

Electronic shutter

The electronic shutter has a sync speed of 1/60s according to the manual. This is confirmed during my experiments, the maximum usable shutter speed is 1/60s regardless of which flash I have used so far, going above that will result in a black band.

With the shutter speed set to 1/60s the camera captures the full image area.

Already at 1/80s, which is only 1/3 stop above the specified flash sync speed there is a visible black band at the top of the image.

The black band is growing rapidly as the shutter speed is increased. This image is taken with 1/100s shutter speed.

At 1/125s almost half the image is covered by the black band. 

This is taken at 1/160s, more than half of the image is now black.

The last one with the electronic shutter is taken at 1/200s shutter speed. This is the highest shutter speed with which the camera still triggers the flash. At higher shutter speed there is no trigger signal out of the camera and the flash is not triggered.

Mechanical shutter
The mechanical shutter is in many ways better when a flash is used. One reason is that the specified sync speed is much higher than with electronic shutter. This is possible because the shutter movement is much faster than the electronic shutter is capable of emulating so the shutter blades can expose the full image sensor area at higher shutter speeds.

This is taken at 1/250s shutter speed, which is the documented maximum shutter speed with flash, also called the flash sync speed. 
This image is taken at 1/320s shutter speed. The camera still manages to handle the flash, the shutter is fully open at this speed. No shading, or black band is caused by the shutter blades.

This image is taken at 1/400s shutter speed and still no shading, a fully usable image.

Shading starts at 1/500s. With the mechanical shutter the shading is from the bottom up and the band does not have as clear edge as with the electronic shutter. This is because there is a distance between the actual shutter blades and the image sensor and this is normal for mechanical shutters. 

Shutter speed: 1/640s and the shading is now significant.

Shutter speed: 1/800s. ...and so on, until at 1/2500s almost nothing is visible, except a very narrow part of the image. After that the flash fires too late and only a black image is taken.


The Nikon 1 V1 can be used only up to 1/60s shutter speeds with the electronic shutter, just like it is specified in the manual. With the mechanical shutter, even though the manual specifies 1/250s shutter speed as maximum, in reality we can use even 1/400s without any negative effects.

Please note that the above conclusion is only valid for my flashes and my camera. I don't know if every camera or even the Nikon V2 and the Nikon V3 behaves similarly, or if this is valid with every other usable flash. I tested with the Olympus T32, the Osram VS280 Studio, Metz 30BCT4 and Sunpak Auto zoom 3000 flashes. 

Please note also that the above is only valid through direct connection. With a radio trigger the trigger sets the limit as well and my radio trigger works only up to 1/250s, above that speed there will always be shading. 

If you are interested in buying the V1F1A flash adapter or want to know more about it, please follow the link below.