andy_van_eynde

February 3, 2006

Thanks!

Heard it already from other people.

Will see if mine area also like that since sometimes they seem to fit like a charm and other times they are to wide.

But adapting them is not that much of an effort and rather have to do that then them beeing not neutral (like the ones from Cokin).

February 3, 2006

They are very good lenses...but keep in mind the 1.6 crop factor of the Rebel XT! If it is not an issue you have a very good setup.

February 2, 2006

Thanks for all the help!

Just ordered a slim P-holder and HiTech GND's (0.6 soft and hard, 0.9 hard).

February 2, 2006

- download file to pc

- open file (should be a *.exe) so it will unpack itsel into a *.fir file.

- copy this *.fir file onto your CF card (so put card in cardreader and copy the file directly into the root of the CF).

- insert CF into 5d and be sure that there is no lens attached.

- go into the menu and then "firmware"...follow the instructions.

February 2, 2006

That is why I'm talking about their slim version!

It only has 1 slot.

February 2, 2006

PS am using a Canon 20d body

February 2, 2006

Can someone tell me for certain if a Cokin P holder (slim version)

will vignette on a 17-XXmm (in my case a EF-s 17-85mm).

Would like to buy a system that can hold rectangular GND.

Went to a store today (biggest Canon shop around) but the salesperson

was not sure of it and did not have a slim version in stock.

Hope there is some kind soul who can help me with this one!

Thanks in advance for all the help!

Andy

February 2, 2006

Have the 17-85 and plan to visit Rome this summer.

Don't think the 17-40 will be wide enough to catch the colloseum (not completely that is). It is a very huge building situated in the centre of Rome and do not think that here will be a lot of open squares around it.

For me the 17mm is wide enough though on my 20d, well for most things I shoot anyway.

What you could do is buy the 10-22 (seems to be a damn good lens) and the cheap but very good EF50mm f1.8 Prime.

February 1, 2006

As far as I understand it. An EZ can be used on a 20d. But the EZ series do not support ETTL!

From "Flash metering systems used by Canon EOS." out of that first link :

- EZ supports TTL and A-TTL

- EX units support TTL and E-TTL (and E-TTL II)

So on a 20d it can only be used in TTL mode!

E-TTL II:

Introduced in 2004 with the EOS 1D mark II digital camera and the EOS Elan 7N/EOS 30V/7S film camera, E-TTL II is an improved version of regular E-TTL which includes two key innovations.

Improved flash metering algorithms.

First, E-TTL II examines all evaluative metering zones both before and after the E-TTL preflash goes off. Those areas with relatively small changes in brightness are then weighted for flash metering. This is done to avoid the common E-TTL problem of highly reflective materials causing specular highlights in a flash-illuminated image and throwing off the flash metering. Normally E-TTL II uses evaluative algorithms for its flash metering, but the EOS 1D mark II has a new custom function (CF 14-1) that lets you use centre-weighted averaging rather than evaluative metering for flash metering if you prefer.

Distance data incorporated into some calculations.

Second, E-TTL II can use distance data when it�s available. Many EF lenses (see list in next section) contain rotary encoders that can detect the current focus distance. For example, if your camera is focussed on an object 4 metres away then the lens will send this approximate focus distance data to the camera body.

Under certain conditions the distance data is factored into the calculations for determining proper flash output. This is particularly useful if you use the focus and recompose method without setting FEL - the new system can help minimize flash metering errors under these conditions. Canon describe the new system as essentially metering flash data across a flat plane rather than a point.

Up until now distance data hasn�t really been used much by EOS cameras. Some PIC (icon modes) apparently incorporate distance data into their exposure calculations, but that�s really been about it. E-TTL II is the first really useful application of this information that Canon have implemented, and is obviously very similar to the fashion in which Nikon have long relied on distance data for their flash metering system.

February 1, 2006

http://www.kjsl.com/%7Edave/speedlites.html

February 1, 2006

Long awnser, read this :

http://photonotes.org/articles/eos-flash/

February 1, 2006

The 50 f1.8 is not that expensive (around 90USD), so even if it is not the ideal lenght it still stays a bargain lens!

Also have a 20d and bought this one after having very long doubts about buying a Sigma 30mm f1.4 (but 4x more expensive).

So far I do not regret it for a moment!

February 1, 2006

"L lenses are out of range for this wallet"

But you own a 70-300 USM IS DO? It cost (almost, if not) as much the 70-200 f2.8L!

Best prime price/quality is for sure the EF50 f1.8 (mkI of mkII).

Might also consider the EF28mm f1.8 (with the 1.6 crop it might be a bit better for indoor situations).

January 31, 2006

One of the canon EX series (model depending your budget).

Have a 20d and bought a Canon 430EX a month ago.

And om also just shooting pictures for a hobby.

By the way also read this (you'll learn a lot from reading it) :

http://photonotes.org/articles/eos-flash/

Congratulations with the new member of your family!

January 30, 2006

What about hat new Sigma 17-70 f2.8?

Not out yet but announced on dpreview a few weeks ago.

http://www.dpreview.com/news/0601/06011802sigma17-70.asp

January 26, 2006

Sorry...but why does it matter if it is a digital or not?

What effecct does it have on the filter?

January 26, 2006

Hi all,

Have a 20d and a 67mm lens (EF-s17-85 & EF70-200 f4L)

Am interested in buyng a square GND.

So far I was looking at a Cokin P holder and some HiTech GND filters

But after reading many posts I have some questions.

- Does a normal P holder cause vignetting on the EF-s 17-85.

Or should i go for the slim version (only 1 filter mount though)?

- Was looking at GND filters from HiTech...but read that they are a

bit too wide for the P holder? Or at least used to be. Is this still

so?

- Doe it a soft or hard filter has any influence on a 1.6 crop...

read a post that stated that it was better to use the hard version

(HiTech) on a crop body?

Thanks for all the patience and help!

Andy

January 25, 2006

Thanks for all the help!

Finally see the end of the tunnel. :-)

Still have to figure out wich brand i'm going to take though.

But that will be just a matter of reading a lot of opinions of other users...

January 24, 2006

My lenses are the EF-s 17-85 (am using a 20d btw) and a 70-200f4L.

They are both 67mm.

Should I check for vignetting on that 17-85 lens?

Most landscapes I take are at the wide end so seems that a soft type is a good one to start with.

January 24, 2006

Is it better to start with soft ones?

Was thinking about starting with a 2fstop (Singh ray)

January 24, 2006

Thnx guys.

Is there also a Soft and Hard version with circular GND's?

Was looking at the GND below but do not see any indication about it being a soft or hard type?

http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=10456&is=REG&addedTroughType=categoryNavigation

Or is this only applicable with rectangular filters?

So if I would go for a rectangular I would need :

- Cokin P121 & P122 Graduated Gray G2 Resin Filter

- "P" Series 67mm Adapter Ring (P467)

- "P" Series - Filter Holder

How easy does that resin scratch? Is it in any kind of protective case when you buy it? (like the B+W circ. polarizer : is in a hard plastic case).

January 24, 2006

Hi guys,

Need some help about GND filters for a 67mm lens.

Am interested in buying a B+W 501 and or 502 filter.

But am doubting between a circular one or a square one.

So far I read that the square one is easier to use because you don't

have to aim your lens to match the horizon (can shift the filter).

But it takes up more space in the bag.

Am just talking pics as a hobby so wonder if a circular is not enough,

and accept the fact that I have to watch out how I frame the picture.

Another thing that is not so clear to me (in case of a rectangular GND):

- what size do I need if I'm getting a square one?

- how do you mount that on your lens?

Assume that you need a coklin holder or so...but what type.

Thanks for all the help!

Andy

January 24, 2006

From : http://www.usa.canon.com/html/eflenses/lenses/ef_17-40_4l/ef_17-40_4l.html

It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters.