July 28, 2014, 05:10:27 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Tristan944

Pages: [1] 2
1
If Canon would make reasonably priced gear, more people would buy.

2
EOS Bodies / Re: Why not higher resolution video?
« on: April 26, 2013, 01:06:49 AM »
Because it is not trivial to process the larger amounts of data per second. Processors need to be fast enough and be able to dissipate the heat.

I can see that, but the new GoPro does 4k.

3
EOS Bodies / Why not higher resolution video?
« on: April 25, 2013, 11:51:04 PM »
High definition video is approximately 2 megapixels. Most of Canon SLRs are 18 megapixels or more. 4k video is 8.3 megapixels. Why don't all the current body's feature 4k or higher video resolution?

4
EOS Bodies / Re: Safe to leave lens on camera?
« on: April 21, 2013, 06:02:00 PM »
What about lenses with plastic mounts?

The EF-S 55-250mm f/4-5.6 IS II is a fairly big lens with a plastic mount. Over time would the plastic bend, warp, and lose a tight connection? Especially if the lens and body get very hot in the sun or trunk of a car, I could see this being even more problematic.

5
EOS Bodies / Re: Safe to leave lens on camera?
« on: April 20, 2013, 04:18:42 PM »
Maybe this would be more of an issue with Rebel bodies, as their construction is plastic.

Another thing to consider is weather sealing. Do camera bodies AND the lens both have a rubber gasket at the housing connection to keep dust out? I know body caps don't have a rubber gasket, so that could potentially lead to dust entering the body if only a body cap was used for a long period of time.

6
EOS Bodies / Safe to leave lens on camera?
« on: April 20, 2013, 02:41:17 PM »
I have my 70-200 f4L USM on my 7D and it got me wondering, with the weight of this lens (and other lenses), is it safe to leave the lens on the body at all times? If so, should the body be facing up with the weight of the lens pushing on the body? Or maybe should the camera be hanging down so the lens is pulling on the body?

Or should the lens be removed and a body cap used?

7
Software & Accessories / LP-E6 shelf life
« on: January 06, 2013, 01:26:39 AM »
I have a new, never been opened LP-E6 battery. I don't intend on using it for several years. How long do these batteries stay good unopened?

8
EOS Bodies / Canon 7D soft images
« on: December 11, 2012, 03:03:51 AM »
I know this is an old topic but I was wondering if anyone has figured out a "fix" or anything. Maybe the soft images are the result of 18mp crammed into a small APS-C sensor. Sometimes I get tack sharp pictures, but usually I just get average pictures, not as sharp as would be expected. Ive played around with the micro adjustment and it didn't seem to help. Main lenses I use are the 18-135, 50mm 1.8, and 70-200 f4 is usm.

9
Lenses / Re: Rebates
« on: December 05, 2012, 10:39:36 PM »
It's been my experience that Canon "rebates" are fake, in that they save you no money. When I was buying my 7D + 18-135mm kit, a $300 rebate did not change the price. Same for the 70-200mm f4 is usm I just bought. Before the rebate the price on Amazon was $1200. Once the $150 rebate started, Amazon showed an MSRP or $1350 and sold it for $1200. The "rebate" wasn't a rebate. It was a marketing ploy to make people think the price has been lowered, when in reality, its the same price as before the rebate.

10
Lenses / Re: APS-C lens mm are correct
« on: December 05, 2012, 09:27:23 PM »
For what a fool I made of myself, you guys have been great. I'm glad I made the mistake because I never will again.

I'm still confused as to why Canon and other companies don't print onto the lens the actual focal length that will be utilized. I now know that the 18-135mm lens is an 18-135mm lens, but the camera and pictures being produced are not at 18-135mm, its at 29-216mm. Isn't it more "honest" and more relevant to tell the customer what the "actual" focal length(s) the lens will be giving him? Because zoomed out, its not showing 18mm, its showing 29mm. Telling me that it is 29-216mm lens would make more sense because that is what focal lengths are actually being used.

11
Lenses / Re: APS-C lens mm are correct
« on: December 03, 2012, 09:45:49 PM »
Well brethren, the results are in, and I am humbled.

Test configuration:
Canon 7D with EF-S 18-135mm at 35mm (I looked at file data and confirmed it was at exactly 35mm)
Canon film Rebel with EF 35-80mm (just turned the lens to 35mm and looked through the viewfinder. Didn't need to take a picture)

Results: I was wrong. The Canon film Rebel was wider at 35mm with the EF lens than the 7D was at 35mm with the EF-S lens. How embarrassing. At least I learned something.

12
Lenses / Re: APS-C lens mm are correct
« on: December 03, 2012, 09:31:24 PM »
If I'm wrong I'll be the first to admit it, I'm not a proud person. I will check it again right now and see if I had done it incorrectly.

But why doesn't Canon print on the lens itself 29-216mm? The 18-135mm printing is misleading then.

13
Lenses / Re: APS-C lens mm are correct
« on: December 03, 2012, 09:17:39 PM »
Also, think about this. If the 18-135mm lens is really 29-216mm, why didnt they just call it that? Remember, this lens will never be put on a full frame body, so the 1.6 crop factor is non-existent.

The only way you will see what I am talking about is if you do a crop body and full frame comparison. Put an EF-S lens on a crop body and a EF lens on a full frame at the same focal length as indicated on the lens, such as at 18mm and 18mm, or 50mm and 50mm, and the images will be the same.

14
Lenses / Re: APS-C lens mm are correct
« on: December 03, 2012, 09:08:16 PM »
I've done it myself. I took a picture with the following configuration and the pictures were identical.

Canon 7d with 18-135mm lens at 35mm.
Canon Rebel (film, so full frame) with 35-80mm lens at 35mm.

Why did the picture turn out the exact same? Because the 18-135mm at 35mm is at 35mm on my 7D. Since this is an APS-C only lens, the stated focal length is correct. It was not "zoomed" in to 56mm. The picture was IDENTICAL to the Canon film Rebel at 35mm.

Do it yourself and be amazed.

Get an APS-C-only lens and sent it to XYmm on a crop body. Then, get a EF lens and set it to the same XYmm on a full frame body and the two images will be the same. (I understand that the image will be different if an EF lens at the same focal length will be different when put on an APS-C body). Trust me, do exactly what I said and you will see that I am correct.

Do it right now and report back.

15
Lenses / Re: APS-C lens mm are correct
« on: December 03, 2012, 08:47:43 PM »
You are confusing it like other people do. You saying what the focal range would be if the 18-135mm lens were put on a full frame body. But here is your error, you can't put APS-C-only lenses on a full frame body. The 18-135mm CANNOT be attached to a full frame body like the Canon 5D. It can only be put on a APS-C body. Therefore, calculating the crop factor of what it "would" be on a full frame body is irrelevant. The only thing that matters on an APS-C-only lens is the stated focal range, in this instance, the 18-135mm. The focal range for this lens will never need to be recalculated for a full frame camera, because you cant even mount it on a full frame camera. Thats why so many people get confused and automatically multiply it by 1.6. Its 18-135mm, thats it.

Consider this scenario. The view and angle through the viewfinders for the following two scenarios will be identical:
Canon 7D with the 18-135mm zoomed to 18mm.
Canon 5D with an 18mm Full Frame only lens.

If you had no idea what camera I handed you, and gave you these two configurations, the image through the viewfinder would be identical and you wouldn't know which configuration I gave you. The 7D with the 18-135mm at 18mm will not be more "zoomed" in at "29mm". If the lens is at 18mm, then its at 18mm. If its at 135mm, its at 135mm.

The only time this changes is when a lens that is compatible with full frame cameras is put on an APS-C body. Then you multiply the focal length(s) by 1.6.
 

Pages: [1] 2