p.1 #1 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
Hello fred miranda community,
This morning an idea struck me that I would love to see turn into reality. I think it would be awesome, but I was wondering what kind of reception it might get from others. Here's my idea:
An EF to EF-M converter that includes shift movements, allowing you to shift any of your EF lenses.
Here's why it would work:
1. To convert an EF to an EF-M, you need, in effect, an extension tube of ~22mm. That extra distance allows you space to put the necessary mechanics. Shifting and "super rotator" movements would be ideal.
2. EF lenses have image circles that far exceed the APS-C sensor on the new EOS M camera. Haven't done the calculations, but you should be able to shift a significant amount.
3. The tricky part will be the electronics necessary. To do it, I may have to buy a Canon EF to EF-M adapter and disassemble it.
4. Tilting probably wouldn't work. My guess is that when you tilt the lens, the apex is the lens' nodal point, which will be different for every lens, and dynamic for zoom lenses.
5. Another bonus feature would be to fix a tripod mount to the LENS side of the shift mechanism. That way when you are making a panoramic with shift movements, there will be no parallax error. It'll be so easy to stitch the resultant picture.
My question to the community would be, would you want one? I have a TS-E 24 and I love it. I have tons of EF glass and I would love to have the shift functions on all my lenses.
p.1 #5 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
Since adapter manufacturers already produce this kind of shift adapters (and even tilt and shift combined), like for instance Kipon for Sony NEX and others, there seems to be no technical reason to believe this is impossible. From a license point of view however, I believe Canon will firmly protect their mounts. Its up to one of the manufacturers to stand up, be brave and produce some EF-M mount adapters. Not just Tilt and shift, but also with mount conversion to adapt other lenses than Canon EF lenses. EOSfun for everyone with all types of glass, without mirror shaving
p.1 #8 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
pmp6 wrote:
My question to the community would be, would you want one? I have a TS-E 24 and I love it. I have tons of EF glass and I would love to have the shift functions on all my lenses.
It's a very good idea. If the price is reasonable, I'd like one. I have a Hartblei Super Rotator but it is quirky with flare and low contrast.
In another thread, jcolwell was explaining how he uses Mirex adapters that adapt Mamiya 645 medium format lenses to Canon EOS and provide tilt and shift. This would be the same thing, and given the relative sensor areas it should provide about the same amount of tilt and shift.
Lenses like the pancake 40 f/2.8 that vignette noticeably will do less well than some others. Lenses that have rear baffles in the shape of rectangles will be very limited.
p.1 #12 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
Bullseye5d2 wrote:
This raises a question in my mind ; If this is possible, why doesn't canon produce a DSLR tilt-shift adapter that could fit on any canon lens??
It's only possible in this scenario because of the mount registration difference between the native EF-M mount and the EF mount. It provides the extra space necessary for the movements. And it's only a good idea for EF lenses. EF-S shouldn't be shifted.
p.1 #13 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
You can't do it with any EF lens to an EF mount. Any adapter, like an extension tube, is going to move the lens away from the sensor and you would lose infinity focus. On the other hand, with the EF-M mount, you already have to move the EF lens farther away from the sensor.
Anyone less rusty on their trigonometry to solve this for me? How much can I shift in the horizontal and vertical directions?
I'm getting +/- 11.13mm of vertical shift and +/- 9.19mm of horizontal shift. So, effectively 11mm vertical and 9mm horizontal. Can anyone independently verify this?
p.1 #16 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
AJSJones wrote:
KISS?
36x24mm = FF
22x15mm = APS-C
Therefore minimum values would be
36-22 =~14mm total increase or 7 left and 7 right
24-15= ~9 or 4.5 up and 4.5 down.
Maybe more depending on the actual size of the circle from different lenses (baffles etc)
You could add to these values if you use the newer TS lenses ( ±12 ish) to give lots of movements
But the APS-C sensor is not as tall as full frame, so it can move even further left/right, and not as wide as full frame so it can move even further up/down. So restricting the shift to the constraints of a full frame sensor is not making the best out of the situation.
p.1 #17 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
Assuming the following:
1. The EF lens has an image circle just large enough to cover a 36x24mm sensor, and no larger
2. The adapter does not have any interior baffles that might block portions of the EF lens image circle
Then the correct calculation for the maximum amount of vertical shift (expressed in millimeters of deviation from the image center) is:
and Sh[1.6] = 9.04162 mm. In fact, this formula can be generalized for any two format sizes. If (X, Y) represents the horizontal and vertical dimensions of the larger format, and (a, b) represents the horizontal and vertical dimensions of the smaller format, then provided X^2 + Y^2 > a^2 + b^2,
Note in particular that we do not need X > a and Y > b individually; that is to say, the "smaller" format may actually not fit inside the frame of the "larger." All that is necessary is that the (a,b) format has a smaller image circle than the (X,Y); as long as this is the case, the lens can be shifted to some extent.
Finally, note that assumption #1 is not necessarily true--some (non-TS) lenses do have an image circle that is larger than required, although adequate optical performance outside the 22mm radius is not guaranteed.
p.1 #18 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
StillFingerz wrote:
How about an EF-M adapter for older MF glass like Canon FL/FD mount?
I like the shift idea
my guess is that will be one of the first 3rd party adapters to hit the market. old canon glass on a canon digital easily for the first time
unlikely to come from canon though.
p.1 #19 · Canon EOS EF to EF-M converter WITH SHIFT MOVEMENTS
That's what I'm hoping Ian, I didn't start using the EOS system until late 1998, digital in late 2007...20 years shooting with Canon FD bodies; 20+ lenses...bellows n macro gears!
I'm not to fond of a no viewfinder body, but if an adapter comes out that lets me fully exploit my old lenses; infinity focus...the EOS M is a no brainer, I'm guessing my aging mind/eyes/habits can adapt to a touch screen interface, they're all intune with my Galaxy Nexus
