ro_ro

The instant stop down metering of the FA requires a linear focusing screen that darkens with larger aperture values. Modern focusing screen of Nikons that don't meter with Ai lenses are optimized for a bright images with cheap 4.5 to 5.6 zooms. So I don't think it will be reliable on a D70 and like.

One thing that could be added to a D70 is an option to enter the an open aperture value of an AiS lens. Then it will meter and work like a P lens.

But I think that no one will do that 'hack', because it uses more work than a D2X will cost.

Another option is to connect a 'mod'-chip in parallel to the internal contacts that transmits the aperture value when no CPU in the lens is detected. A small display and keys are used to enter the aperture value. It may all fit into an option vertical grip.

That will works with all cheap cameras but requieres the camera to be disassembled and any warranty will be lost. Anyone interested?

Ro

Hi Mike,

G lenses can be used with the FA but there are many limitations.

Without tricks a G lens can be used in A at maximum apeterure. Eposure time is displayed is wrong but the FA will expose right, the time is the same as manually stopped down. At S you can use minimum aperture of the lens, the FA varies the time if it doesn't match the time on the time wheel.

If you adjust the aperture coupler to f22 or similar, S works correctly with adjusting the apterture with instant stop down mode. P also works. See the images of my FA.

I've made correct exposures with the DX 18-70 G on slide film.

Ro

David,

you could add 220mm for the AF 105 Micro at 1:2.

I own this lens and the only thing I don't like is colour fringing with objects that are just not in focus when the lens is used wide open and close focussed.

Stopping down at least two stops solves this problem and makes it a fine lens.

Here is a comparision of macro lenses:

http://dc.watch.impress.co.jp/cda/longterm/2005/07/06/1866.html

Regards

Ro

You should first remove the plastic protection that is screwed into the lens mount. Then you can remove the two screws from the CPU contact unit.

Then you can replace the mount.

Why do want to replace it?

Ro

Hi Lex,

yes I want to see if some of the makernote data is different between VR on and VR off.

Ro

Hi,

you could email me some untouched images taken with a VR lens.

Plaese note if VR was on or off. The images can be taken at smallest JPG size with high compression to keep them small.

nkrs_lens 䴠hotmail o com

Regards

Ro

I've build a small LPT to lens adapter and can read out the aperture data with a windows program.

I've also gotten a clone AF CPU running. It's now installed in the 200/4 AIs and works fine. D70 says 200mm F/4 ;)

It should be possible to make chips for any focal length and any apertures. How long can you wait?

Write me an email for more info.

I installed chips into a Series E 100/2.8 and an AIs 200/4.

They work fine but doing it proper in not so easy as many think. The holes for the chip must be drilled exactly and some lenses need the lensmout to be grounded by about 1/2mm where the contacts are mouted to get proper contact with all Nikons.

The next problem is finding a chip that fits machnically and has the same aperutures as the manual lens.

It works with a 601 because the 601 has an aperture coupler and no EE switch.

Only AF Nikons that don't meter with an manual lens need the tab.

FEE mean that the EE-switch is not closed. Normally it is closed when the maximum aperture is (e.g. 32 or 22) chosen. Kenko tubes and TCs have a small tap that closes the EE-switch even when no lens is mounted.

You may have the maximum aperture not completey chosen and locked or the little tab on the lens is damaged.

Can you post a picture from the Tamron's lens mount?

> You just focus and meter manually within the camera, like back in the 50's and 60's.

This is real F compatibility ;)

My Tamron 1.4x TC works with the 70-300G lens. But the image quality is not so good.

The TC doesn't work with my 18-70 DX. AF is hunting and doesn't lock.

I think Nikon will release up to 9 lenses during the next months.

I guess there will be VR micros and cheap VR Zoom, like a VR 100-300 4.5/5.6

I hope we'll also see something like a 70-210 f4.

I think you can cut at point 'A'.

The chipping of a MF lens is doable. But it needs quite a lot of time if done properly.

I can post images of some steps.

Bill,

thanks for your image. You have been the only one who send me a pic.

Seems to be not much interest here.

An 'Ultrasonic' lens from Nikon ;). I've read something about micro AF-S on another page. It donsn't have FTM.

It has less CPU contacts, only 8 of them and isn't compatible with a TC, doesn't make sense either.

The plastic mount looks cheap.

The lens seems to be sharp but has heavy CA as you can see on the first photo.

Ro

Yes. All non-D are fine. Old 'D' types, e.g. the first ones from the early 90's are also good.

Data from new 'D' lenses do I have enough ;-)

Ro

I'm still working on the custom metering chips.

I found out that D70 and D2H store some of the lens data in the

mankernotes.

You could help me to get further if you send me blank images as JPG

(with lens cap on an fast shutter speed) in lowest resolution and

worst JPG compression. Please don't do any postprocessing. The images

should be not greater than 100kb, I think.

Another way is to cut off the first 80kb from an image, doesn't matter

in JPG or NEF, and send me them.

I need data from the old non-D AF lenses, preferable original Nikkor.

Also data from 'P' lenses like the 500/4P and the PC 85 Micro are useful.

Mail them to: 'nkrs_lens at hotmail.com"

Please don't send files > 1MB, my space is limited.

Thanks in advance.

Ro

N4004s, if you use modern 'G' lenses.

Use it in manual mode an add a split-image screen for AF-S lenses.

For Ai lenses the old FA is a very nice camera.

I don't think that Nikon will make a future SLR, except from pro models, that can meter with non-af lenses.

The pro SLR will still be able to meter with manual lenses, since the 35/1.4 and the 50/1.2 are not avilable as AF lens and can bei bougth new as AiS.

I think the 300/2.8 Nikkor is a good choice. The Tamron and Tokina are not really cheaper and are harder to get.

Even the old AF-I 300/2.8 ist getting interesting, since more people are switching to Canon or buy the new VR.

Ro