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New AF chips, how they work?
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PostPosted: Fri May 01, 2009 12:31 pm    Post subject: New AF chips, how they work? Reply with quote

Does anyone know how the new generation of AF chips work?

in particular:

- how do you set the aperture and focal lenght values in the chip?

- can the values in a chip be changed more than one time?

- how do you fix the chip to the adapters (what glue?)

thanks!


PostPosted: Fri May 01, 2009 12:38 pm    Post subject: Reply with quote

They work just fine, especially if you use one favorite f stop with a lens. Then the focus confirm and the exposure are automatic. I have not tried the AF focus calibration.

I have four of them and enjoy the versatility.

Here is the text from the eBay seller where I purchased mine on how to change the settings. Yes, they may be changed over and over.

Text follows :
The new series has the programming option, that is, you can change Dandelions aperture and focal length settings without removing it from the camera. The new Dandelion also has the calibration function that makes focus confirmation more accurate.
The new Dandelion doesn't use the MF mode because now focusing works with the AF (autofocus) mode. Firstly, this improves focusing accuracy. Secondly, this enables the user to calibrate Dandelion for different kinds of lenses. Thirdly, the acknowledging beep is now available for all cameras (e.g., for film camera EOS 3000N). Focusing sensor is much more sensitive in this mode.
Another new option is "hard" blocking of shutter release until acknowledgement signal. If you hold the shutter release button up to the stop, the shot will be done immediately in response to the signal. This allows to make pictures of fast-moving objects.
And of course the most important advantage of this new series is the possibility to change settings of Dandelion without having to remove it from the camera first. See programming instructions.
Dandelion is suitable for all Canon EOS digital and film cameras.
Dandelion's settings:
Aperture From F1.0 to F64, the step depends on cameras model
Focal length From 1 mm to 65535 mm, with each step of 1mm
Correction of focus confirmation dot 17 levels
Focus mode AF / MF
Entering program mode Delay from 1 sec to 99 sec, with each step of 1 sec








Changing Dandelions Settings for Canon

Before you start:
Set EV Step to 1/3 EV. Set the camera to the exposure mode M; set exposure to 11 seconds or more.
Programming of Dandelion is simple and includes three steps:

1. Activation of the program mode
2. Command input
3. Data input
Activate the program mode in Dandelion. First, capture some sharp image in order to quickly return to it later.
Turn the adapter ring on the bayonet joint to detach Dandelion from the camera (the camera will display aperture "0.0"). Hold your finger on the shutter release button and turn the ring again to make Dandelion touch the camera. Within 3 seconds starting from that moment you will have to press the shutter release button and set exposure to 11 seconds or more.
After the exposure finishes, Dandelion will enter the program mode. As you turn the control dial, the aperture will change from F3.5 to F11. Herewith each aperture corresponds to a number (see table 1).
Aperture F3.5 F4.0 F4.5 F5.0 F5.6 F6.3 F7.1 F8.0 F9.0 F10 F11
Corresp. Number - 0 1 2 3 4 5 6 7 8 9
Table 1. Aperture and corresponding numbers.

Please mind that the camera won't make a shot until it receives the acknowledgement sign. That's why within the 3 seconds you will not only have to press the shutter release button, but also capture a sharp picture with your lens. So you won't be able to change any settings of the Dandelion without the lens.
However there exist exceptions:
Set the camera to AI Servo mode (focus tracking mode) if your camera has one. As a rule AI Servo mode doesn't block the shutter release.
Turn the blocking off in the menu if your camera has such option.
If Dandelion is set to MF mode, there is no blocking by default.
All new Dandelions by default have a 10-second delay before activation. You can change it from 01 to 99 seconds (see F11 function). A short delay helps activate the program mode quicker. A longer delay excludes the possibility of an accidental activation.
Like you have already understood, in order to activate the program mode you will have to make one shot within 3 seconds after power connection, with exposure 1 second longer than the default time. By default Dandelion is set to 10 seconds, thus the activating shot must be at least 11 seconds long.
Please remember that the activating shot must be started no later than 3 seconds after you turn the ring and Dandelion touches the camera. Otherwise the program mode will not be activated.
In program mode Dandelion will set the camera to the MF mode automatically in order to prevent problems with shot blocking.
Dandelion will stay in the program mode until you enter a correct command or data. If you wish to quit the program mode anyway, turn the adapter ring to detach Dandelion from the camera.
In the new Dandelion the delay before activation is set to 10 seconds. You can change it from 01 to 99 seconds. See also F11 function.
If your camera has the bulb mode, use it instead of M.
If your camera has a depth of field preview button, you can use it for command and data input. Just press it on certain apertures. However, to activate the program mode you will still have to make a shot in the M or bulb mode.
Some cameras (usually old film cameras) have a fixed EV step of 1/2EV. In that case several programming options may be unavailable.
Command and Data Input
Command input is as simple as making one shot on certain apertures. After that you will have to enter several digits (data). The data are to be entered as such, for example, the number 28 must be entered in the following way: first 2, then 8.
List of Commands And Their Formats
F4.0 + aperture aperture change. Make a shot on aperture 4.0. After that the camera will allow you to choose an aperture from 1.0 to 64. Choose any using the control dial. To choose, make one shot on the chosen aperture, Dandelion will remember it and quit the program mode.
You cannot choose or program any intermediate apertures, such as F1.7.
Mind that if aperture is set from F1.0 to F2.0, it may influence exposure metering and reduce it.
Incorrect aperture "04", or "00", or " " (empty), that is, the one with value less than 1.0, is false and cannot be programmed.
F5.6 + 5 digits focal length change. The digits are to be entered from greatest to least. If the focal length is less than 5 digits, add zeros. For example, for 50mm: 00050. All five digits have to be entered.
Therefore, to change focal length to 50mm, make shots successively on the following apertures: F5.6 (command), F4.0 (the first digit is 0), F4.0 (the second digit is 0), F4.0 (the third digit is 0), F7.1 (the fourth digit is 5), F4.0 (the fifth digit is 0).
Focal length ranges from 00001mm to 65535mm. If the command and 5 digits are entered correctly, Dandelion will quit the program mode. Check the result.
F8.0 + 2 digits from 01 to 17 correction of focus confirmation dot. Dandelion calibration function. You can move the dot a bit forward or backward, to manually find the calibration constant. By default Dandelion is set for the center, constant 09.
F9.0 (without settings) switching focus mode between MF and AF. This option is the same as MF/AF switch on an autofocus lens. Please mind that in the MF mode accuracy of focus confirmation depends on the direction in which the focus ring is turned. Besides, some cameras may not make an acknowledging beep (then check the viewfinder).
F11 + 2 digits delay before entering the program mode. This is set to 10 seconds by default. You can change it into 01 to 99 seconds.
Mind that if you set the delay timing to 15 to 99 seconds, you will have to make an activating shot 16-100 seconds long to enter the program mode. Not all cameras will allow you to do that. Then use the bulb mode.

I am assuming Dandelion is the name used for the chip. Since I bought mine already mounted for less than $30 each for the adapter, chip and shipping, I have no idea on what adhesive is used.


Last edited by greg on Fri May 01, 2009 12:46 pm; edited 1 time in total


PostPosted: Fri May 01, 2009 12:44 pm    Post subject: Reply with quote

All these things have to be done for taking ONE SHOT ? Shocked Shocked


PostPosted: Fri May 01, 2009 12:45 pm    Post subject: Re: New AF chips, how they work? Reply with quote

Orio wrote:
- how do you set the aperture and focal lenght values in the chip?

- can the values in a chip be changed more than one time?

I have no idea but I guess a combination of settings in the camera (mf-af, aperture, click to focus and so on, can be used to communicate with the chip. Or maybe they store the data before they send you the chips and it can't be changed...


Quote:
- how do you fix the chip to the adapters (what glue?)

For difficult surfaces I always use epoxy, it's very strong and sticks to anything. In this case (metal to fiberglass board), I think it's the only good option, but I have to say i've never glued the chips to adapters myself.


PostPosted: Fri May 01, 2009 12:47 pm    Post subject: Reply with quote

looks like an unbelievable headache Mad


PostPosted: Fri May 01, 2009 12:47 pm    Post subject: Reply with quote

Oops i hit quote minutes ago and there are replies already...
Orio wrote:
All these things have to be done for taking ONE SHOT ? Shocked Shocked

That's just for configuration, one time Razz


PostPosted: Fri May 01, 2009 12:52 pm    Post subject: Reply with quote

there are some things in the description that sound weird at the very least, for instance "capture some sharp image"

what if the object is not sharp? Question or not sharp enough (and how is enough?)


PostPosted: Fri May 01, 2009 12:56 pm    Post subject: Reply with quote

http://forum.mflenses.com/new-chip-with-user-changeable-values-for-m42-to-eos-adapter-t15646.html

A few messages on this forum from a couple weeks ago.

It is actually easy to do once you go into programing mode. It is done once and the settings are saved until you go back and change them at a future time.

I have one for my VPK Meniscus lens mounted in an old 135mm lens. I set it for 65mm and f5.6. It works very nicely. The other settings I have not played with as I don't need them

I assume it refers to the ability to change the back/front focus point for sharper images using the focus confirmation LED in the viewfinder.


PostPosted: Sat Jun 06, 2009 7:35 pm    Post subject: Reply with quote

The "micro adjust" for the AF confirmation is a nice feature! It takes some time to understand the programming instructions, but actually it is very logical.

My settings are:
F-number: 2.8
AF-adjust: 05
MF/AF: MF
Orio wrote:
there are some things in the description that sound weird at the very least, for instance "capture some sharp image"

what if the object is not sharp? Question or not sharp enough (and how is enough?)

By default the adapter is in AF mode, which means that the camera only wants to trigger the shutter when focus is confirmed. The easiest way to enter programming mode is to set the focus to infinity, and point to an object far away. The picture doesn't need to be sharp, but the camera must be tricked in thinking that it is focussed.
Once in programming mode, you can switch the adapter to MF mode, which is the same as the traditional chipped adapters. That is my preference.


PostPosted: Fri Jul 01, 2016 1:20 am    Post subject: Easy switching from AF(Trapfocus) to MF outside chip Reply with quote

There is an easy quick method switching from Trapfocus(AF) to MF without going into chip-menue when set to AF there:
in EOS 1000D individual functions no 9: set 0 or 2
in german 0=AF/AE-Speicherung(saving)
2:AF/AF-Speicherung-Keine AE-Speicherung
Dont know exactly what these are for, knew once when studying manual.
Since i almost only use manual lenses its not effecting my work except when i want FC work also when in AF mode. As i said thats Trap-Focussing, shutter only working when focus is correct.
That means setting back to 1 or 3 measn Trapfocus again-when programmed to AF in chip always
-------------------------------------------
Optixpcb-chip is easiest to program, has three data-set-options but C/Y-EOS must be avoided. Have a seperate thread explaining. They use a special adapter which does suit for the lens and camera. It has a special base not available on the adapter which seems to be the best for CY-lenses.:K + F Concept. Must find someone trying to mount optixpcb-chip there anyway. Leitax cannot/does not want to glue.
Dandelion-chips have a special stairshape which is ideal for mounting. Optixpcb is flat. Forget its C/Y-EOS version altogether -i have high precision. Have the same ring here worth a few usds.