November 23, 2014, 02:44:12 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 - Frage

Pages: [1] 2 3 4
1
EOS Bodies / Re: \
« on: October 13, 2014, 03:28:12 PM »
This video is not new anymore, right?

How should the user choose where to focus in the frame while capturing video?

2
EOS Bodies / Re: Scott Kelby Does a Field Report on the EOS 7D Mark II
« on: October 08, 2014, 07:40:53 PM »
Is it even legal the way these 3 treat their audience?

Put a model in a white dress in a dark building under perfect controlled light conditions and say is great camera for wedding photography.

About WiFi: "You don´t have internet in your camera". WTFFF???

This "review" can´t be taken seriously.

3
Canon General / Re: seeimpossible.usa.canon.com?
« on: October 05, 2014, 06:18:36 PM »
a 15 Stops DR Camera strap (?)

4
Lenses / Re: Canon APS-C<Speedbooster<EF Lens. Possible?
« on: September 23, 2014, 10:56:03 PM »
Hi people!

I am sorry if this a stupid question but I have to ask in order to learn.

Is possible such a combination?: A Canon crop camera with a (I think not existing)speedbooster and any EF lens in order to gather the "extra" light the lens is providing and the sensor, due to its smaller surface, is not able to use. Would it improve APS-C sensor ISO performance?

Thanks in advance and sorry if it is a completly dumb question.
Hi,
    Speedbooster is basically a focal reducer. IMHO, it's had nothing to do with sensor size as long as the original lens produce an image circle that can cover the sensor, but focal reducer will usually reduce the distance where the image is focus on, so it's difficult (if possible) to maintain flange focal distance of any lens and mount of the same type. That's why speedbooster only appear for SLR lens to mirrorless mount, so speedbooster for EF lens to EF mount might not be possible, but speedbooster for EF lens to EF-M mount is possible.

    Have a nice day.

So if Speedbooster (SB) is a focal reducer then

(Wikipedia)
Quote
where f is the focal length, and D is the diameter of the entrance pupil (effective aperture). It is customary to write f-numbers preceded by f/, which forms a mathematical expression of the entrance pupil diameter in terms of f and N.[2] For example, if a lens's focal length is 10 mm and its entrance pupil diameter is 5 mm, the f-number is 2 and the aperture diameter is f/2

Does really work like that?

5
Lenses / Canon APS-C<Speedbooster<EF Lens. Possible?
« on: September 23, 2014, 09:32:25 PM »
Hi people!

I am sorry if this a stupid question but I have to ask in order to learn.

Is possible such a combination?: A Canon crop camera with a (I think not existing)speedbooster and any EF lens in order to gather the "extra" light the lens is providing and the sensor, due to its smaller surface, is not able to use. Would it improve APS-C sensor ISO performance?

Thanks in advance and sorry if it is a completly dumb question.

6
Portrait / Re: Can we identify this man?
« on: September 21, 2014, 03:14:45 PM »
If someone needs a law to tell them that this is wrong, they shouldn't be out in public unsupervised.

Jim

Well said! For some people only laws and punishment are the limits for their morale.

7
PowerShot / Re: The New Canon PowerShot G7 X
« on: September 15, 2014, 06:16:16 AM »
Quote
Lens conversion 24-100mm F1.8-2.8

This might be not completely accurate. Shouldn't we multiply the aperture as we do with the focal length?

Correct me if I'm wrong please.

8
LOL!!!

Just like my extern HDD.

9
Lenses / Re: The New Canon EF-S 24mm f/2.8 STM Pancake
« on: September 11, 2014, 08:55:10 AM »
Nice lens, but "shame" it is s EF-S

10
Holly mother!

Quote
South America, Mexico, etc.


I am from etc. I guess, whatever that means. #AllTheSame

11
Pricewatch Deals / Re: 7D European Deal...
« on: July 30, 2014, 08:44:09 AM »
I wouldn´t buy here. Grey import, no warranty, and custom payments. A real head ache.

12
How is supoused to be good for video a zoom lens (EF-S 10-18 f/4.5-5.6 IS STM) with no constant max. aperture?
Am I missing something? Please do not tell me "you shouldn´t zoom while making videos". ;)

13
How relevant could be the fact that Canon is the main sponsor of the World Press Photo 2014?

14
Lenses / Re: DXOMark: Sigma 24-105 f/4 DG OS Reviewed
« on: December 18, 2013, 09:03:53 AM »
Whatever it is -- retail resellers all over the world (or at least in some countries) should be happy with Sigma's decision to release its 24-105 version with that MSRP  :)

This should rise demand and popularity of unkitted 24-105 L. (And probably its price too.)

I can easily imagine a salesman in photo store babbling something like:

"Yes, this is a new Sigma 24-105! It's a great and mighty lens, just released! But... Look at this display for a second -- this is original Canon 24-105! See this red ring here? It's L-lens! Feel how small and light it is! IQ is just is as good. Do you like it? It's usual price is 3 hundreds more than Sigma. But today only for you, I can sell it for the same price as this 3rd party Sigma! And I even will add a filter and this Lowepro case for free!!! Because I see you are real 'pro' who need a lens like that!"

 ;D

Yeah!

Nice speech :D

15
Lenses / Re: DXOMark: Sigma 24-105 f/4 DG OS Reviewed
« on: December 18, 2013, 06:54:23 AM »
Yeah, it only undercuts the Canon because DxO still has the 24-105 costing 1250, which is far above its current street price.  It may be a slightly better than Canon's 24-105, but with the Canon version selling at 600-700, the Sigma isn't quite the bargain as when the Canon sold at 1250.

Canon's MSRP for the lens is $1149.

That is somewhat irrelevant since that is not what people are paying for it.  The question would be what is the actual street cost of the two lenses.
That is somewhat relevant since not the entire world is living in the countries where the street price is the mentioned above.

As a corollary, Sigma lenses aren't available in the entire world  ;)

Even in other countries, the Canon 24-150 as part of the kit will be available for roughly equal to or less than the Sigma.

BTW, from personal experience, Sigma's after sales support in other countries sucks big time!


What is your point?

Pages: [1] 2 3 4