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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 23 Jul 2012 (Monday) 11:37
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Kenko 300 DGX 1.4 with Canon 50mm 1.4?

 
PicBug
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Jul 23, 2012 11:37 |  #1

My husband is leaving out of town and taking the 85mm with him. Soooo, I have a hospital maternity session probably going to happen while he's gone. I thought an option might be, rather than put out for another 85, was to get the TC 1.4x for my 50mm 1.4. On my 5DMKii, that would give me 70mm for a tight hospital room without being TOO wide angle. PLUS, we can use it on most of our other lenses as well. ;-)a

Does anyone have any wisdom or feedback on this setup? I can't find much on the web.


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msowsun
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Jul 23, 2012 12:52 |  #2

Why not just use the 50mm 1.4 and crop the image as needed?


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PicBug
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Jul 23, 2012 13:02 as a reply to  @ msowsun's post |  #3

Because The 50mm on a full frame in that tiny room will yield unappealing results. Too wide angle for my taste and style.


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msowsun
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Jul 23, 2012 13:36 |  #4

PicBug wrote in post #14757485 (external link)
Because The 50mm on a full frame in that tiny room will yield unappealing results. Too wide angle for my taste and style.

Adding a 1.4x teleconverter to the 50mm will force you to stand back. Skip the teleconverter and just stand back the appropriate distance and then crop the image later.

The end result will be as good, or better than using a 50mm +1.4x


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tdodd
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Jul 23, 2012 14:30 |  #5

I just tried my 5D2, Canon 50/1.4 and Kenko 1.4X Pro 300 DG (not DGX). The combination does not report EXIF correctly and there is some hunting at times. I'd say the image is unusable wide open, not matter what size you intend to display/print. Closed down a stop the centre sharpens up a bit, but edges and corners are very bad. I'd say you need to close down by at least 3 stops to get the corners passable, but still not great. That's f/4 reported, f/5.6 actual. The DGX version might well do better, in all respects, but I really have no idea how it performs. Optically it is supposed to be the same, but there is some jiggery pokery to improve EXIF data handling.

However, it might be that my 1.4X is not a great example. It works perfectly well with my 100-400 at 400/560mm, but is absolutely abysmal with my 135/2L, even when stopping down a few stops, and that's on a 7D, so corners not even put to the test.

I think you're going to need at least one more opinion about the combo, because my experience may well not be representative. It might also be worth noting these remarks from the Kenko website....

The PRO 300 family are designed specifically to be used with prime telephoto lenses of 100mm or above, such as 300 mm f/2.8 lenses, and work best with telephoto lenses of 200mm to 500mm. The PRO 300 can be used with telephoto zoom lenses as well as prime lenses. However, Kenko does not recommend them for zoom lenses that have a range starting under 50 mm.

I'm considering buying a Canon TC, as a replacement, which hopefully will perform far better across the width of the frame on a wider range of lenses. It would be quite nice to be able to turn 135mm at f/2 into 189mm at f/2.8 without needing to carry a whole extra lens around. At the moment I am unable to do that successfully. :(




  
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Jul 23, 2012 15:31 as a reply to  @ tdodd's post |  #6

You could the 50 on your 7D!


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PicBug
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Jul 23, 2012 15:49 as a reply to  @ jimewall's post |  #7

Yes I could except the 85mm is going on the 7D with my husband. :) I'm in a pickle.


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Jul 23, 2012 16:04 |  #8

PicBug wrote in post #14758377 (external link)
Yes I could except the 85mm is going on the 7D with my husband. :) I'm in a pickle.

Speaking of pickles..... I would still use the 5D Mk II and then pretend it is a 7D by cropping the image afterwards. Sort of like "Digital Zoom". The 5D Mk II has lots of "megamapickles" to play with and will give you good results. ;)


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Jul 23, 2012 16:21 |  #9

I've just tried my 50 1.4 and my Pro300 DGX 1.4x converter on my 60D and to be honest I wouldn't use it for anything I was getting paid for. It's not bad quality and could be printed at smallish sizes but I think it'd become noticeable on larger prints. I'll try it out on my 5D3 tomorrow in daylight and see if it's any better. It does report the correct FL and aperture on the EXIF though by using the DGX converter.


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Jul 23, 2012 16:26 |  #10

The other problem that I notice is the out of focus bokeh is not what I would call great when using this teleconverter, in fact I reckon it can be a bit weird at times.


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jimewall
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Jul 23, 2012 18:27 |  #11

PicBug wrote in post #14758377 (external link)
Yes I could except the 85mm is going on the 7D with my husband. :) I'm in a pickle.

In that case I agree with msowsun, just crop. This should not be a problem with the 5DII, though I have not used it.

Or use this as an excuse to get the 100L. Take the 50 and the 100L with the 5DII, and your based should be covered. Plus you can still crop images from the 50 if you think need to.


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Roroco
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Jul 23, 2012 18:43 |  #12

Extenders are great for teles, but with a 50mm, I don't see much use for it. In a hotel room, the different between 50mm and 70mm is a step or two toward the baby/mother. 70mm isn't really going to compress the background all that much compared to 50mm.

So, I would just foot zoom some and crop if you need a bit more. Regardless, I wouldn't put a TC on the 50mm.


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Jul 23, 2012 19:16 |  #13

Why not rent a 85mm 1.8 for the event? IQ wise, it's almost the same.


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Jul 23, 2012 19:40 |  #14

Earwax69 wrote in post #14759393 (external link)
Why not rent a 85mm 1.8 for the event? IQ wise, it's almost the same.

+1 most logical solution, IMO.


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Jul 23, 2012 20:59 as a reply to  @ 1Tanker's post |  #15

I have tried my Tamron SP 1.4x TC (white model) with my EF 50mm f/1.4.. All I can say it's quite unsuccessful,,, it hunts like crazy even in good light.

But,, it seems to work with my EF 85mm f/1.8 OK..


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Kenko 300 DGX 1.4 with Canon 50mm 1.4?
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