• The Canon Rumors Forum has officially been shut down as of July 10, 2026.

    All data will be deleted on September 16, 2026.

    the ad free experience will return by July 17, 2026.

  • Locked
Canon 100mm f2.8 L is owners, dust circle inside lens?

Hi all, I just got a 100L and was looking down the front of the lens through to the rear under a light and noticed what seems to be a weird circle of stain or dust on the inside of the lens(around the edge and 2/3s near back element), was wondering if anyone with the same lens has the same thing.

This lens is supposed to be weather sealed and the stain is not on the back element, so was wondering what it was. Apart from this strange circle, everything functions great, maybe it's a reflection off something. thanks

  • Locked
600EX RT & ST E3 RT - issues and testing

Undocumented testing – as the Manual failed to explain how this works fully (or I missed it in the manual):

I thought my ST-E3-RT was faulty: Well this is my testing method over an hour last-night:

-
Was wondering why my 600EX/STE3RT *beep* isn't functioning? Drove Me mental trying to work it out - initially thought I had faulty units, then thought it was proximity to the strobe.

But then I turned on the *beeps* on the strobes themselves and noticed they weren't beeping... Tried a different body, different lenses, used the 600EX as master, switch to optical, factory reset etc...

Then I stuck the strobes on 1:1 - and there we have it. They don't *beep* unless they are cycling. At low power output they will never *beep*.

-

In my mind *ready Beep* should signify the system is ready to fire.
In actuality it only triggers when the capacitors are depleted and recycled.

Nowhere near as useful…

You would expect especially when shooting the flash-head through a window that the beep would tell you it’s ready but if you are on 1/8 power you will never hear it beep as it’s always ready.

But the second I put it on manual 1:1 and it took a second to cycle (12 batts) then it beeped every time.

Have already sent this through to Canon - doubt they can fix it :/

  • Locked
Worth Getting 24L & 35L both?

I shoot wedding and portraiture, I am targeting to shoot most of my weddings with shallow DOF and available light. I currently have the 14L, 50L & 85L already and the standard zooms 17-40, 24-70 and 70-200/2.8.

I am looking at the getting one or both the 24L and 35L and although I am favoring the 35L for portraits but I am wondering if it is worth getting both? Is there enough of a difference to also get the 24mm?

  • Locked
LR4.1 RC to blame. Check this out!

So I read in the EOS bodies for stills forum that DPP handles the RAW files far better than light room. So to test this, I took this photo outside of my apartment with a bright texas sun off of white rocks and a nice dark shadow in the covered hallway. I opened the photo with DPP and just saved it to Full tilt TIFF. I then opened the photo in CS5.5 and Duplicated the background layer. On this new layer I adjust the shadows and highlights to 100% on the shadow slider. I also brightened the "X" even further using the dodge tool set to shadows and 100 exposure.

Let me blow your mind a little.

7133044449_80d50ce4a9_b.jpg


AND......

7133055985_d1eb9a9800_b.jpg



obviously these could not have been taken by a 5D3............. ::) ::) ::)

http://www.flickr.com/photos/mattbicephotography/ here is my photostream so you can go look at the pictures at full size. I think LR4.1 RC certainly works better with Nikon.

  • Locked
How does Mk. III handle 2 micro AF adjustments?

So... enough time has passed for a lot of users to have calibrated their 5D Mark IIIs. I'm left wondering, out of curiosity's sake, how the new AFMA works. Let me expand on that...

With the new AF system in the 5D3/1DX, users can now provide 2 AFMA values; one for the long and one for the wide end of zoom lenses. Let's say for argument's sake my 70-200 worked best with +4 at 70mm and +12 at 200mm - does the camera scale the AFMA across the zoom range? (i.e. automatically guesses +8 at 135mm, halfway between the two extremes?).

I'm not sure how anyone would have this information, but I'd love to be enlightened.

  • Locked
50 mm 1.2 L or 1.4

Hi everyone,

I wanted to ask for more opinions on the choice I have to make. I want to upgrade my 50mm 1.8 so I am wondering whether to go for 1.4 or 1.2. I know that the L lens is professionally built, better bokeh and faster of couse. But some reviews (the-digital-picture for example) say that the 1.2 is softer than 1.4. How much of an issue is that? How is the autofocus of both?

If I am going to use it in studio with lighting, is the extra f-stop really useful, or I can save some budget for other equipment?

On a different subject, I can buy on a bargain a lens, which distance-metering window is missing; can this be causing problems with dust entering the lens?

Thanks

  • Locked
f/2.8 telephoto lenses have better AF than slower lenses?

This I have culled from www. learn.usa.com (with thanks) about 7D auto focus:

"... the center AF point has a separate diagonal pair of high precision line sensors which provide even greater precision - automatically used with lenses f/2.8 or faster....."

When considering an investment in a big lens is this a consideration ie go for the f/2.8 lens rather than a longer f/4?

  • Locked
Evolution towards video - away from stills?

Hi All,

With all the current new announcements it seems like Canon's focus is moving more and more towards video. Why am I saying this:

  • The 5D III has been reported to have a very strong AA filter. From what I understand this helps predominantly video quality
  • The new T4i seems to have most improvements in the video sector and almost no improvements for stills
  • Then there are the current releases/ announcements of 1D C and C500

There haven't been any releases new products on the stills front. Yes, the 5D III improved a lot of the shortcomings of the 5D II, but the IQ is almost unchanged unless you shoot at super high ISO. The 1D X is still not being in stores and on the APS-C side nothing happens at all (apart from the T4i "video camera").

Will this be a general change towards more video and less stills? What's your take on it?

  • Locked
Battle of the 50mm's (1.2L , ZE 1.4, ZE 2.0)

Hi All,
I've recently got my 5D Mark III, and got it with the kit lens, and in a months time I really want to pick up a good 50mm prime (I've come from film, and a good 50mm prime was the lens that stuck to my camera body the most), so I've narrowed it down to these three choices. I'm liking the 1.2L, as I was really quite impressed with the build quality of the 24-105 (I thought I'd hate it coming from all metal film lenses), and the fact that it has a bit of a larger aperture, and let's admit, it looks really nice too.

The other two options are both Zeiss, and I'm considering these due to their build quality (closer to what I was used to) and the fact they're manual focus only is a non issue for me, I'm quite used to it from when I shot film, and the 5D III's focusing screen is super bright, and very easy to MF in (even with the f/4 lens)

So basically, I'm just wondering what people who've maybe tried any of these lenses have thought and which you would reccomend :) I'm sure they're all fine lenses and I'll be just as happy with any, but would love to hear some opinions.

Thanks in advance all! :)

battleofthe50s.jpg

  • Locked
Can anyone figure this out?

Liberation Begins - 5DMK3 OLPF Removal Day 2 on Vimeo

I love the look of this video. the video is basically focusing on the fact that he removed a filter within the 5d mark iii. but im trying to figure out what color correction/or lens or what he was using to achieve that look. It seems people have asked in the comments section but the uploader doesn't seem to respond. I feel like this look is possible to be achieved without removing this filter. if anyone can give some insight that would be awesome.

  • Locked
Markins camera plate for 5D3 is in stock

If anyone is interested, Markins got their camera plates for the 5D3 in last Thursday. I received mine today and I'm very pleased.

There are many good plates available but I prefer Markins plates because they are lightweight and low profile yet they are bulletproof. Like heavier, larger competitors, there is a place to attach a hand strap or screw in a 1/4-20 stud to the bottom of it. Unlike many competitors, the attachment point is square so the plate fits into the clamp in either direction.

Compared to the Markins plate for the 5D2, the new 5D3 plate is somewhat larger, though not thicker. And, unlike the RRS plate for the 5D3, the inside edges of the new Markins plate are curved to perfectly match the contours of the 5D3 body. This was a big deal for me. I didn't care for the RRS approach.

  • Locked
D800 v. 5D3 threads: What should Canon's takeaway be?

For those of us who remain a little envious of the D800's sensor (and I already know there are those who could care less), is it the superior dynamic range of the D800 sensor, the superior resolution of the D800 sensor, or both?

I ask because, for me, it is strictly the dynamic range that I covet. Being able to pull clean shadow detail out of total darkness is a big deal for me. As for the extra megapixels, I would rather have better low light sensitivity if I had to choose. It would be disappointing if Canon looked at the many D800 v. 5D3 discussions and concluded that any dissatisfaction on the part of Canon users is due to the disparity in resolution. That's not it. Not for me. But I wonder to what extent that is true for everyone else. Thoughts?

  • Locked
Seeking lens in the 85-100mm range

Hi all,

Currently considering a prime/fixed focal length lens in the 85-100mm range and would appreciate thoughts, impressions, recommendations.

Amateur shooter here (not pro). I have a 60D- I mostly use zoom lenses, the only fixed-FL lens I have is the 35 1.4, which is great (starting to use it a bit more after ignoring it for a while). I used to have the 85 1.8 but traded it in towards a 70-200 2.8 (totally the right decision, love that lens), but now I'm starting to look for a possible alternative when I don't necessarily want to carry around the extra weight and/or gather attention.

Mainly this lens I might use for occasional sporting events (when 70-200 isn't practical due to weight, etc.), taking shots of flowers/foliage, and for shots when I want the background as blurred as possible. I'm not much of a portrait photographer- there are times where I've been asked to take someone's picture, but that is not really what I do (or have experience with).

Lenses I've been looking at:

I was considering buying the 85 1.8 again. Great lens, but from my usage the 70-200 2.8 is just as sharp at 85mm/2.8, and has better focus too. Too much purple fringing at 1.8 in my opinion.

85 1.2- tried it in store today. Amazed at the quality but was taken aback by how slow the focusing is. It's pretty bulky too. But I was wowed at the test photos I took with it- especially the test portrait shot which looked professional with almost no effort on my part...my concern here would be for the times I substitute the 70-200. I feel this lens would struggle to keep up with even moderately-paced action. I did run a quick test (took a burst of shots of someone walking away from camera), seemed ok but hard to tell. Expensive, too, but not completely out of range (better be a solid reason to drop 2K on a specialty lens!)

100 2 - also played around with this in store. Fast focusing, which is great...light weight, which is both good and bad (good being easier on the neck, bad being harder to steady since there is no IS). However, I found myself somewhat displeased with the purple fringing at f2 and the image quality (seemed a bit soft). Still, it is being considered mainly because of its inconspicuousness.

135 2 - tried this out as well. Excellent quality and light weight (same points as above). Quick focusing. However, I feel that because of its longer focal length, its usefulness is somewhat reduced. I can see this being a great substitute for the 70-200 though as far as sports go (mainly shooting in dimmer indoor environments).

Any others? I'd like to stick with Canon lenses if possible (I had a Tamron 17-50- it served my needs for about a year, then I traded it in for the 17-55 2.8 and afterwards, wondered what took me so long to do it). What are your recommendations, experiences, etc.? Any help would be appreciated

  • Locked
Mirror-less and EF Lenses

A mirror-less camera is generally a thinner camera than d-slr which may mean the lens mount would put the rear element of a lens much closer to the sensor than on d-slr bodies. this means new lenses are need that are able to focus properly on the sensor. and if an EF lens was mounted to it, it would be trying to focus on a sensor that is further back than on the mirror-less sensor. so what are the chances of a new mount system, new lenses, but with the same EF technology. This would allow for an adaptor to be released that would simply pull the ef lenses further from the sensor, to be able to focus correctly, and still be able to AF and control F-stop.

made a little picture of my thought

Attachments

  • idea.jpg
    idea.jpg
    18.9 KB · Views: 602

Filter

Forum statistics

Threads
37,480
Messages
975,426
Members
24,816
Latest member
GLBDD

Gallery statistics

Categories
1
Albums
29
Uploaded media
372
Embedded media
1
Comments
25
Disk usage
1 GB