April 19, 2014, 07:38:51 PM

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Messages - candc

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1
Here is a link to a review at tdp. Its useful because it has a comparison tool for comparing all the ultrawides. I chose the sigma 8-16 because I think the IQ is just as good or better than the canon and its the widest.


http://www.the-digital-picture.com/Comparisons/Canon-EF-S-10-22mm-f-3.5-4.5-USM-Lens-Image-Quality.aspx

2
ken rockwell says the 6d af is better than the 5diii which is too complicated. the 6d af doesn't get in the way, it just works baby!

but then kr says the sl1, 18-55 stm combo is just as good a the 5diii, 24-70ii combo.

 

3
EOS Bodies - For Stills / Re: the canon 100d/sl1
« on: Today at 07:55:28 AM »
i bought one as a gift a while ago and used it for myself for a bit. i liked everything about the camera and was shocked at how good the 18-55 stm kit lens was

4
Software & Accessories / Re: shoulder sling
« on: Today at 07:45:56 AM »
it looks like a good strap, there is not much info about it on the site. the pictures show it used to carry the camera on the left which is what i do with the br sport left (br sport is not really revearsable) it doesn't say if this one is or how you adjust it? the only thing i don't like about the br straps is that the length adjuster is on the back and it slips sometimes so you either have to take it off or move it around to the front to get at the strap adjuster. i am thinking of trying one of the luma cinch type straps which are quick adjusting from the front.

5
Lenses / Re: Sigma vs Zeiss vs Canon
« on: April 18, 2014, 07:32:44 AM »
Here are some sample photos taken with the Nikon 135/2 Defocus lens that shows the difference between normal boke and boke in a lens with spherical aberration:

No Defocus


Flat blur circles, sharp subject, clearly defined focal plane. Looks great, nothing wrong with it, but it is not the same kind of boke as you get from a lens with spherical aberration:

With Defocus (spherical aberration)


Spherical blur circles, highlighted outer ring, radial gradient to the center. Soft and dreamy highlights on subject at the focal plane. Focal plane itself is less defined, softer, smoother.

This is what you get with a lens that has spherical aberration. The blur circles cannot be replicated in post if you start out with solid ones. The dreamy effect can be approximated with post-processing effects...but it's never quite the same. This is a fairly specific effect, one that must be done with optics to get the full effect in all it's aesthetic glory. If you want this...you gotta buy a lens that offers it. Either a soft focus control/defocus control lens...or something like the 50L/85L.

If you still can't tell the difference, well, then all I can say is those two lenses are definitely not for you. :P


i did not know that there were lenses that had an adjustment ring to control that effect, i don't really understand how it  works but it is a very cool feature, are there any other lenses besides this nikon that have that adjustment? i really want one now.

6
Lenses / Re: Teleconverter advice
« on: April 15, 2014, 04:35:41 PM »
there are sample variations and some tc's seem to work better with certain lenses.

here is a site that did testing on all the converters available and it seems the kenko mc4 is the best on average across the frame, that makes it a real bargain and i might pick one up and try it.

http://www.traumflieger.de/objektivtest/open_test/telekonverter/overview.php


Am I reading the data in Traumflieger's site correctly? It seems to say the (presumably older) Kenko mc4 is not only better than the current Kenko version, but also that the mc4 is better (in the way it is being measured) than the Canon 1.4 Mark III? Please let me know if I am misreading the data or how this could be? Thanks!


yes, i found it interesting to see the results. what they are showing is the resolution of a lens and camera combo, a 5dii and 70-200 f4 at 200. the numbers below each tc are the drop in resolution center, mid, and edge, they also average the 3 and list them along with the resolution in lpm of all the tcs across the frame at the bottom.

others have pointed out that there are other attributes besides sharpness but according to the data on the site: the kenko mc4 is the sharpest tool in the shed

i also found it interesting that the series ii tc's are sharper in the center but not near as good in the mid frame and corners as the series iii which makes sense i guess if your lens is already a bit soft in the edges then losing another 500-600 lpm res is going to show pretty bad. it seems they choose to give up some center sharpness in order to get better mid frame and corner performance with the series iii


7
Lenses / Re: Teleconverter advice
« on: April 13, 2014, 07:51:23 PM »
there are sample variations and some tc's seem to work better with certain lenses.

here is a site that did testing on all the converters available and it seems the kenko mc4 is the best on average across the frame, that makes it a real bargain and i might pick one up and try it.

http://www.traumflieger.de/objektivtest/open_test/telekonverter/overview.php

8
Lenses / Re: Teleconverter advice
« on: April 13, 2014, 04:30:37 PM »
 I have the teleplus pro 300 dgx or what is called the "blue dot" version. I have read around the web and found from my own comparisons that the sharpness is on par with the canon. I havent had any metering or exposure problems, it works as it should. I haven't noticed any background blur/bokeh anomalies but then I was not looking for it so maybe there is some degradation there?

Here is a review of the kenko that may be useful to you because the lens that is used is the tamron 70-200


http://www.steveoakley.net/template_permalink.asp?id=263

9
Third Party Manufacturers / Re: Sigma 50mm f/1.4 Art Gets Reviewed
« on: April 13, 2014, 12:57:39 AM »
http://www.sonyalpharumors.com/sr5-et-voila-first-picture-of-the-sigma-24-70mm-f2-0-full-frame-lens/


Most seem to view that picture as a fake.

Yes, but rumor has it that it exists


I have from solid sources that it exists for sure. Maximum magnification is 0,86x and it has a new revolutionary 5x image stabilization system, AF faster than the EF 24-70 f2.8L II and it is weather sealed ... :P


Stop! It's cruel to tease me with that kind of talk!

10
Lenses / Re: Teleconverter advice
« on: April 12, 2014, 09:38:53 PM »
I have the kenko pro 1.4x and the canon 1.4xiii. They both have about the same IQ. The kenko is about half the price and works on just about everything, the canon has weather sealing.

11
Lenses / Re: Tamron 150-600mm AF servo issues?
« on: March 29, 2014, 09:28:14 AM »
After reading the posts here I did some experimenting with the lens on a 6d and a 70d. At 150 it works fine but at the longer focal lengths with the cameras set to ai focus and if you focus on a distant point and then quickly move to a near target or vice versa, the camera does not try to refocus unless you let go and repress the AF on button. This has never been a problem but I see its there once I looked for it. I use the lens in ai focus mode most of the time and it seems to track okay but it seems it will quit if there is a drastic change. Its not a big deal to me but something to keep in mind

you are the first who reports this with the 5D MK3, 6D and 70D.

unless it´s the typical behavior you also see with other original canon telephot lenses too.

this kind of "issues" attract people to test things and notice behavior they have not notice before and blame it on the lens.

there are no report from 5D MK3 user that the lens behaves strange.

for comparison i tried the same test using the sigma 120-300 and found that the bare lens is fine but if you add tc's then you get this same behavior so it seems an issue of max aperture and how well ai servo functions and not an issue that is specific to the tamron.

12
Lenses / Re: Tamron 150-600mm AF servo issues?
« on: March 28, 2014, 08:37:29 PM »
After reading the posts here I did some experimenting with the lens on a 6d and a 70d. At 150 it works fine but at the longer focal lengths with the cameras set to ai focus and if you focus on a distant point and then quickly move to a near target or vice versa, the camera does not try to refocus unless you let go and repress the AF on button. This has never been a problem but I see its there once I looked for it. I use the lens in ai focus mode most of the time and it seems to track okay but it seems it will quit if there is a drastic change. Its not a big deal to me but something to keep in mind

13
All three lenses – the new Compact Zoom CZ.2 15-30/T2.9, the CZ.2 28-80/T2.9 and the CZ.2 70-200/T2.9 – will also be available as a complete set (without transport case) for € 44,999 € or US$ 59,900 (excl. VAT)*.

No carrying case for the set? That's a flat out deal breaker for me, I am going to pass  for now.

14
I am still trying to understand why it is not guaranteed to get a sharp picture with AI server for stationary objects with shallow dof as long as light is enough. But there won't be any focus confirmation beep. Considering there is no AF lock with AI Servo, it is not possible to do focus and recompose with it right?. Do I need to always switch to one shot AF with focus and recompose.
Thanks

If you want to focus and recompose using ai servo then you need to use back button focus. In order for it to work you need to go to the customize settings for the shutter button and deselect the "half press initiates autofocus" option.. That way you use your center point to focus using the back button then let go, recompose and push the shutter button.

I always set one of the custom modes this way along with the fast tracking AF settings you see posted here and on other websites. That way you don't have to fiddle around and make a  lot of setting changes to switch back and forth.

15
Sounds like the options here are 1. extremely expensive and 2. Very inexpensive.  I've gone in between with the Sigma 120-300 f2.8 and canon version III teleconverters.  I'm very happy with the image quality so far comparing mostly to my old canon 100-400 and newer 70-300L.  The extra stop or so of light is great but the weight is significant.  Anyone else have the sigma and access to the tamron for comparisons?  I already know that the canon primes are slightly sharper and significantly faster for autofocus.

I've been considering the tamron for those times that I don't want to/can't take the heavy weights.

I have the sigma sport and the canon tciii's also. The sigma bare lens has noticibly better IQ and AF. The sigma with 1.4 has better IQ and AF, sigma with 2x is about the same or marginally better. The tamron is plenty sharp enough and the AF is fine for most everything. The only reason to use the sigma or any other lens in the tamrons range is if you need wider aperture for effect or light conditions. The tamron is so nice to carry and use because of its size and weight. I don't see myself using the sigma with the tc's much anymore but I am still going to keep it for the 120-300 f/2.8

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