topic canon EF 500mm f/4 l is usm lens Image Stabilization settings in EF & RF Lenses

canon EF 500mm f/4 l is usm lens Image Stabilization settings

USCRx — Sat, 27 Jun 2020 22:10:05 GMT

Purchased lightly-used 1st generation 500mm f/4 lens. I'm not sure what "I" and "O" mean for the setting. Also, when would I use Mode 1 and/or Mode 2 (see photo)? Would love any help for these settings. Thanks!

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

wq9nsc — Sat, 27 Jun 2020 23:11:38 GMT

You can get the manual from your lens via download from Canon: https://www.usa.canon.com/internet/portal/us/home/support/details/lenses/support-lenses/ef-500mm-f-4l-is-usm/ef-500mm-f4l-is-usm?tab=manuals

The I and O are stabilizer on (I) or off (O). Mode 1 corrects for shake in all directions while mode 2 corrects for shake primarily in a panning shot so use typically if hand holding the lens and using a shutter speed.

IS works well but it will draw battery power in use so be aware of this depending upon your camera battery capacity. With the 1DX series it isn't an issue but some of the bodies don't have as much "reserve" capacity and you will need to keep an eye on battery level during extended shooting. I don't use it often (I have the 200, 300, 400, and 800 primes with IS) but when needed it really does work quite well.

And on edit: If you haven't used the "great white" primes before, you will likely find the focus stop buttons around the edge of the outer end of the barrel quite handy BUT if you aren't used to them and accidentally push one you will think your AF is broken 🙂 I reassign the back button focus button on my 1DX bodies to focus stop which duplicates that function for the shorter Canon glass.

Rodger

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

USCRx — Sun, 28 Jun 2020 05:29:36 GMT

Thanks, Roger, I was using the EF 500mm today with a Canon 1.4x teleconverter II for wildlife, and all of my shots were not focused sharp. I was guessing that my IS settings were wrong. Now I'm wondering if the teleconverter was the problem? The camera was not on a tripod, but was resting on a fencepost.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

wq9nsc — Sun, 28 Jun 2020 12:29:45 GMT

You are welcome!

What was your shutter speed for the shot that wasn't sharp? The IS under best conditions can compensate for several "stops" of shake but don't count on near perfect results beyond 1 or 2 stops. So with the 500 plus 1.4X on a full frame camera you would still want to be around 1/200 shutter speed if possible and faster still on a crop sensor camera because the effective focal length is longer.

The standard rule of thumb is minimum shutter speed would be 1/focal length without IS, so prior to IS faster than 1/700 for the lens/converter combo on a full frame camera. At this focal length, even with IS and using a "prop" you have to really concentrate on holding it still. The IS corrects for minor operator shake but the "keeper" rate with IS will be less as you reduce shutter speed and you will find that if you take several images at the same shutter speed using IS some will be excellent and others less so because of the interaction between the operator and IS. IS cannot compensate for subject movement so at minimum the shutter speed has to be fast enough to freeze subject motion.

The depth of field is going to be quite shallow under typical shooting conditions with the EF 500 and 1.4X. With it mounted on a full frame camera, at 75 feet the depth of field in focus is just over a foot and the same combo on a "crop sensor" has under 8" of depth due to the longer equivalent focal length. Focus is really critical with this combination and particularly with the converter added you may need to use the micro focus calibration procedure if your camera body provides that to calibrate the lens combo to the body. My EF 800 was dead on by itself to my 1DX II, III, and 5DS R bodies but required a couple of steps of bias with the converter added and this is often the case where a lens is perfectly calibrated by itself but requires a slight micro focus calibration adjustment with the converter. Canon camera bodies that provide this adjustment facility will store separate calibration settings for each lens with and without converters.

I had used EF 300 and 400 f2.8 IS equipped lenses for quite a while before recently acquiring an EF 800 f5.6 with IS and I found that the EF 800 brought a new learning curve compared to my experience with the shorter length glass and if you haven't been shooting with long glass you will have the same learning experience with the 500 and 1.4X.

Rodger

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

USCRx — Sun, 28 Jun 2020 12:58:42 GMT

Thanks again, Roger! I was shooting at 1/1600 sec. I'm now certain I need to do AF microadjustment. What tools did you use to perform the adjustment on your lenses?

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Waddizzle — Sun, 28 Jun 2020 14:02:41 GMT

Whoa, not so fast with the AFMA. Spend more time getting used to the lens. Learn how the lens behaves. Take some shots from a tripod. Compare Live Shots and viewfinder shots on static subjects. It is allot easy to make bad set of adjustments.

What body are using?

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

USCRx — Sun, 28 Jun 2020 14:12:55 GMT

Using Canon Eos 7D Mark II, with Canon EF 500mm L IS USM lens with Canon Teleconverter 1.4x II. Shot in bright sunlight. To me, it looks like most shots are "back-focused."

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Waddizzle — Sun, 28 Jun 2020 14:27:08 GMT

@USCRx wrote:
Using Canon Eos 7D Mark II, with Canon EF 500mm L IS USM lens with Canon Teleconverter 1.4x II. Shot in bright sunlight. To me, it looks like most shots are "back-focused."

They just might be back focusing. How is it without the the tele?

I use the "Dot Tune"method tune do AFMA. I calibrated my 150-600mm with a yardstick and some bricks to angle it.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

wq9nsc — Sun, 28 Jun 2020 14:44:06 GMT

Here is a link to the Canon micro focus adjustment guide: https://cdn.static-bl.com/images/manual/Canon-AF-Micro-Adjust-Guide.pdf

The procedure I use varies only slightly from the Canon procedure in order to save time.

Basically follow their process making sure that you are in good light so that you can use a high shutter speed to avoid any camera induced blur. I use a high contrast object set into the grass at a typical working distance for the lens. Set your aperture wide open, single shot focus with a single focus point on the object. Grass makes an excellent test subject around the object because you can easily determine front or back focus based upon it. I shoot everything using RAW files and even if you normally use JPG, I would go with RAW for this procedure.

Where I differ from the Canon procedure is to take multiple shots with different AF calibration offsets in one session so that I can determine either the exact point from the first session or at least the narrow range needed for the second run to zero in. Since you are calibrating the lens, I would take the series of shots with the bare lens, with the 1.4X converter, and also with the 2X converter if you plan on using one. Start with the bare lens and take three shots with the micro focus at its starting point of 0, then set it to plus 3, plus 5, and plus 8 and take three shots at each of these offsets. Then do the same for -3, -5, and -8. You take three shots at each offset because you don't want one aberrant shot to throw off your calibration procedure.

Do the same run with the converter(s) and then examine your files on the computer. The EXIF data shows the focal length AND the calibration offset so you shouldn't need to write that down (at least when using Windows, maybe not with Mac DPP). Your results should show you either the exact offset needed or you will at least know the offset points you need to take additional test shots within. None of my Canon glass has needed more than 4 bias points of offset with converters but it is possible that within the range of 8 isn't enough for some glass and bodies but I think the odds are very high it will be within the narrow range of +/- 8. Using this process, I can easily dial in a lens and converters in 10 minutes so it isn't a major process.

Rodger

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Waddizzle — Sun, 28 Jun 2020 16:40:55 GMT

Grass works. I like to use a yardstick, bricks, and a target.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

USCRx — Sun, 28 Jun 2020 23:18:58 GMT

Thanks, Roger, I actually performed the test, and the 'baseline' AF looks the best! So now I'm wondering if (when I'm shooting) I should manually focus "out-of-focus", then use auto-focus to zero-in on the subject. I really can't think of any other solution.

Or, as you said, I probably just need to get to know my lens, and what works in the field.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

wq9nsc — Sun, 28 Jun 2020 23:56:30 GMT

If the subject is stationary AND you have time to set up the shot without fear of it moving, setting focus to one shot and using spot AF with the focus point on an eye works wonderfully most of the time. But this creates more risk of missing the subject so I typicall use a cluster of points in the center of the frame. IF you need to lock focus and recompose, that is the perfect situation for using the handy focus stop buttons on the lens.

With your 7D2, see which focus points operate as cross type points with the 500 f4 plus 1.4X and when possible restrict the camera to using those points for the fastest, highest accuracy focusing. These are generally in the center of the AF array and your camera manual will show you exactly which ones are available as cross type sensors based upon the lens "group" as defined in your camera manual.

Rodger

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

USCRx — Mon, 29 Jun 2020 14:28:18 GMT

Thanks so much, Rodger! Super helpful. I'm thinking I might increase my shutter speed, also. With the 500mm, the 1.4x extender, and shooting with a 7D Mark II, I'm effectively shooting a 1120mm lens!

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

ebiggs1 — Mon, 29 Jun 2020 16:03:27 GMT

"I'm effectively shooting a 1120mm lens!"

Also, remember, as a general guide line, 1/1120 sec is the slowest SS you should use. 1/2000 is probably the slowest I think you should use. Now of course this is just a suggestion not a hard fast rule.

Often times mis-focus is blamed when in fact it was camera motion.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Waddizzle — Mon, 29 Jun 2020 17:25:51 GMT

@USCRx wrote:
Thanks so much, Rodger! Super helpful. I'm thinking I might increase my shutter speed, also. With the 500mm, the 1.4x extender, and shooting with a 7D Mark II, I'm effectively shooting a 1120mm lens!

With that much focal length, you will almost certainly want to use some sort of support. You will be looking at the world through a straw. Smallest camera shake will look like 8.0 earthquake on the Richter scale.

Some high end bodies have the smarts to disable IS in some L lenses when it senses that it is mounted on a tripod. I am not sure if the 7D2 is one of them, though. It might be, though. I do not know if there is a way to disable it, either.

With the lens supported on a tripod, then the need to stabilize the image is significantly reduced. I would turn it off, anyway. The biggest benefit of IS in the lens is that it helps to stabilize the image for the AF system, as well as the viewfinder. You won't need it with a good tripod and head, especially with a gimbal, a video fluid head, or even a pan and tilt head..

Enjoy your new toy.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

RobertTheFat — Tue, 30 Jun 2020 20:12:06 GMT

@Waddizzle wrote:
@USCRx wrote:
Thanks so much, Rodger! Super helpful. I'm thinking I might increase my shutter speed, also. With the 500mm, the 1.4x extender, and shooting with a 7D Mark II, I'm effectively shooting a 1120mm lens!
With that much focal length, you will almost certainly want to use some sort of support. You will be looking at the world through a straw. Smallest camera shake will look like 8.0 earthquake on the Richter scale.

Some high end bodies have the smarts to disable IS in some L lenses when it senses that it is mounted on a tripod. I am not sure if the 7D2 is one of them, though. It might be, though. I do not know if there is a way to disable it, either.

With the lens supported on a tripod, then the need to stabilize the image is significantly reduced. I would turn it off, anyway. The biggest benefit of IS in the lens is that it helps to stabilize the image for the AF system, as well as the viewfinder. You won't need it with a good tripod and head, especially with a gimbal, a video fluid head, or even a pan and tilt head..

Enjoy your new toy.

If I were using a lens that long outdoors, I might hesitate to turn off the IS, even with a tripod. Where I live (Massachusetts and Pennsylvania), the motion blur due to wind could rival that caused by an unsteady hand.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

USCRx — Tue, 30 Jun 2020 21:10:13 GMT

OK. So I went out today to Carrizo Plains National Monument (~ 1 hour drive from my home). I was unable to get a sharp focus using my extender (Canon EF 1.4x II) with my EF 500mm 1:4 L IS USM, using a tripod, and shooting at 1/3200 sec. So I stopped using it. Don't know what the issue is.

I used the 500mm alone the rest of the morning with my Canon Eos 7D Mark II. Here was a typical result with the combination - a bull tule elk in front of Painted Rock (500mm, f/4, ISO 160, 1/2500 sec., slightly cropped), It looks sharp, but not super sharp. Don't know if I'm just being picky. Thoughts?

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Waddizzle — Tue, 30 Jun 2020 23:05:09 GMT

Nice shot! It looks pretty good to me. It is hard to judge with a subject that does not fill the frame.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

Waddizzle — Tue, 30 Jun 2020 23:13:57 GMT

"If I were using a lens that long outdoors, I might hesitate to turn off the IS, even with a tripod. Where I live (Massachusetts and Pennsylvania), the motion blur due to wind could rival that caused by an unsteady hand."

The IS can actually soften the image when the camera/lens are being held steady. It can start hunting for motion that isn't there. If you tripod shakes in the wind, then you may need a better tripod. A good one should easily handle 20-30 mph gusts without creating significant camera motion, sufficient to blur an image captured at 1/2000 or faster, in this case.

Re: canon EF 500mm f/4 l is usm lens Image Stabilization settings

wq9nsc — Wed, 01 Jul 2020 13:04:49 GMT

Jim,

The image looks pretty nice to me. You are still dealing with a very shallow depth of field so I don't think the entire subject is in the sharpest focus. You could go to f5.6 or even f8 with that lighting and the ISO would still be quite reasonable.

With enough wind, even a big tripod will have some shake in the wind with a large camera and lens. In my rural area of IL, wind gusts over 30 MPH are very common several days out of the week. I have a Manfrotto 161 MK2B tripod with a Wimberly gimbal head on it and with a sandbag on the tripod spreader, the center column lowered, the rotation screws locked, and the EF 800 plus 1DX III mounted via a dual screw ARCA plate you can still see the camera wiggle in a high wind gust. The Manfrotto 161 is big and solidly constructed but the EF 800 is like a sail to the wind.

Rodger