December 18, 2014, 06:29:10 PM

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Messages - wopbv4

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1
Technical Support / Re: QUESTION ABOUT RECHARGABLE AA BATTERIES.
« on: December 06, 2014, 11:26:07 PM »
What I do after the block of 12 batteries has been fully charged, I switch off the power to the adapter, but I leave the batteries in the adaptor. After 15 min when the batteries have cooled enough, I switch on the power again and I get another 30 min charge on top.
If I understand correctly, you expect the batteries to cool after being charged, and then make a new charging? :o
In this case, you will have no gain in battery life, but will only shorten its lifetime. :-\
I recommend NOT recharge a battery that is already full. :-X
After I charge the batteries and let them cool down, I have measured the voltage and it is on average 1.1V. When I put them back in the (eneloop) charger, the light goes red and it charges for another half hour before light goes green. I take the batteries out, let them cool again and re measure, I get a voltage of 1.15 - 1.18 V.
Whereas your volt meter is working properly, your batteries with only 1.1 volt are damaged, and will never be charged with the nominal capacity.

NI-MH batteries good quality should have actually 1.39 to 1.45 volt immediately after end the charging. I recommend making sure your charger is the intelligent type (and fully functional), avoiding overheating and premature deterioration of batteries.

Hi ajfotofilmagem,

thanks for the advice, you are 100% correct.
I used another voltmeter and indeed the batteries read 1.45 volt when fully charged. Another charge on a full battery does not change that reading, stays at 1.45 V.
So, the green red light can only be trusted in the case of (partially) drained batteries, not on full batteries. This is an important lesson for me.

As such, I retract my previous comments

Again thanks for your help

Ben

2
Technical Support / Re: QUESTION ABOUT RECHARGABLE AA BATTERIES.
« on: December 06, 2014, 05:18:35 PM »
What I do after the block of 12 batteries has been fully charged, I switch off the power to the adapter, but I leave the batteries in the adaptor. After 15 min when the batteries have cooled enough, I switch on the power again and I get another 30 min charge on top.
If I understand correctly, you expect the batteries to cool after being charged, and then make a new charging? :o
In this case, you will have no gain in battery life, but will only shorten its lifetime. :-\

I recommend NOT recharge a battery that is already full. :-X

Hi ajfotofilmagem,

please help me with this!

After I charge the batteries and let them cool down, I have measured the voltage and it is on average 1.1V. When I put them back in the (eneloop) charger, the light goes red and it charges for another half hour before light goes green. I take the batteries out, let them cool again and re measure, I get a voltage of 1.15 - 1.18 V.

Furthermore, with nearly empty batteries, it takes a long time for batteries to recharge in a 12 battery block, several hours. During the charge,  the batteries do get warm, guess about 40 DegC , 105 deg F. I have been worried about this as I have heard stories of exploding batteries. From first hand experience,  I had a battery in my Macbook Pro that became very hot and burned out.

I happy to take any advice

Ben

3
Technical Support / Re: QUESTION ABOUT RECHARGABLE AA BATTERIES.
« on: December 06, 2014, 04:33:04 PM »
Hi Surapon,

I use eneloops all the time. I buy them in 50 packs (AA) at 4$ each.
What I do after the block of 12 batteries has been fully charged, I switch off the power to the adapter, but I leave the batteries in the adaptor. After 15 min when the batteries have cooled enough, I switch on the power again and I get another 30 min charge on top.
Having said that, I use 12 battery for each of my 600EX-RT, 4 in flash, 8 in battery pack and that combo gives me enough to work a full afternoon without fully draining the batteries, but they do need several hours of recharge thereafter. The above combo, compared to batteries in flash only, recharges about 3 times as fast, 4 seconds for full flash goes down to about one second. Is it worth the additional weight of the battery pack? For me yes, but each has to decide.

Hope this helps

Ben

4
Lenses / Re: What is your favorite lens/camera combo in your camerabag?
« on: December 02, 2014, 09:35:37 AM »
Canon 6D w/ 70-300mm L & 35mm f/2 IS & 15mm f/2.8 Fisheye & 430EX II flash.  It's a tough to beat combo and is light and easy to carry in the Lowepro Pro Messenger 160.
+1
The 35mm F2 IS is an absolute dream on a FF body. Very high IQ and I can go down to 1/15 without any problem, which helps in low light.

5
Lighting / Re: Speedlites - How many are enough?
« on: November 16, 2014, 08:48:37 AM »
7-9 is all you'll ever need, but 1 is enough.

+1


Eight.

I use lastolite ezybox II softboxes.
Mainlight I use four speedlites, Fill light one, Rim/back light one, plus two for (white) background.

I know that most people think that four 600EX in main light is overkill, but I use the large 40"  Octa and it gives me a lot of flexibility. The option to "tilt" one or more of the speedlites inside the softbox gives fantastic effects.

6
X-Rite has released Colormunki photo V1.2 which works on MAC OSX10.10 (Yosemite).

X-Rite has also managed to bypass the printing problem that they had in previous versions (= unable to switch of "Color Matching" within ColorMunki Photo software).

Net result is that ColorMunki Photo now produces reliable print profiles, which are very close to the profiles I had created by a professional print laboratory for my printer canon Pro9500 II

I am pleased with the X-Rite response, good work from the software developers

7
Lenses / Re: The next three new lenses? 50, 100 macro, 70-300
« on: November 12, 2014, 08:21:00 AM »
The 50/1.4 is old and tired.... a refresh with better build,optics and a ring USM motor has to come sooner or later. IS would be nice too.
The 100 macro? Still a great lens for the price, the only real improvement would be to add IS, but there's the L version, so that isn't going to happen.
I'm pretty sure the 50/1.4 has a ring usm already. The 1.8 doesn't. That thing is noisy as hell.

Indeed, the 50/1.4 is due for a replacement.
As far as I am concerned if they bring a lens on the market that has same quality, sharpness etc as the latest line of 24, 24 and 35 mm non-l lenses, I will buy one straight away. I have the Canon EF 35mm f/2 IS USM and absolutely love it.
Also, but most likely a manual lens, a new tilt shift around 50 mm and 90 mm would be fantastic. I would be willing to cough up 3000$ for a 50 mm equivalent of the TSE-24 F3.15 mk II

Let me fix up the spelling errors sorry!!

Indeed, the 50/1.4 is due for a replacement.
As far as I am concerned if they bring a lens on the market that has same quality, sharpness etc as the latest line of 24, 28 and 35 mm non-l lenses, I will buy one straight away. I have the Canon EF 35mm f/2 IS USM and absolutely love it.
Also, but most likely a manual lens, a new tilt shift around 50 mm and 90 mm would be fantastic. I would be willing to cough up 3000$ for a 50 mm equivalent of the TSE-24 F3.5 mk II

8
Lenses / Re: The next three new lenses? 50, 100 macro, 70-300
« on: November 12, 2014, 08:18:06 AM »
The 50/1.4 is old and tired.... a refresh with better build,optics and a ring USM motor has to come sooner or later. IS would be nice too.
The 100 macro? Still a great lens for the price, the only real improvement would be to add IS, but there's the L version, so that isn't going to happen.
I'm pretty sure the 50/1.4 has a ring usm already. The 1.8 doesn't. That thing is noisy as hell.

Indeed, the 50/1.4 is due for a replacement.
As far as I am concerned if they bring a lens on the market that has same quality, sharpness etc as the latest line of 24, 24 and 35 mm non-l lenses, I will buy one straight away. I have the Canon EF 35mm f/2 IS USM and absolutely love it.
Also, but most likely a manual lens, a new tilt shift around 50 mm and 90 mm would be fantastic. I would be willing to cough up 3000$ for a 50 mm equivalent of the TSE-24 F3.15 mk II

9
Wedding Photography / Re: Tough LARGE group photo
« on: November 10, 2014, 05:07:51 PM »
Well Done !!
Very tricky circumstances, large open space, not a lot of light.
Shows that using speedlites can make a real difference.

10
Speedlites, Printers, Accessories / Re: Need Best Monitor for Photo Edits
« on: November 08, 2014, 12:06:55 AM »
Hi,

I have done colormangement for a significant amount of time and  in my opinion, NEC and Eizo are by far the best. I know that they are more expensive, but they last long, have internal self calibration, a matt screen  etc.

I do not like any monitor with a glossy screen such as the imacs, especially the retinas.  I am disturbed by the reflections. Furthermore, all the MACs are still only at 8bit/color channel (24 bit total) and that is because that is what the operating system OSX Supports.

It is crazy, our camera, photoshop, NEC and Eizo monitors all support at least 10 bit/color channel, but MAC has refused to support it, much to the grief of XRite and Eizo.

Eizo goes as far as
QUOTE:
we do not recommend update to Yosemite which, in its current form, can not be used for colour management applications.
UNQUOTE
 

11
Another one that I just found out.
Eizo Colornavigator does not work properly under yosemite.
I approached the Eizo developers in japan and got the following reply:

There is an issue with Yosemite regarding its ability to output correct tonal gradation.  ColorNavigator adjusts the video gamma correctly, however Yosemite outputs in the equivalent value of 129 and 128 gray scale gradation (rather than 256) which is why you are receiving the error message.  This issue was identified by our engineers in the Yosemite Developer Preview version and was reported to Apple, however has not been addressed.

Please note that this is not an issue with ColorNavigator.  It is an issue with the OS and consequently we do not recommend update to Yosemite which, in its current form, can not be used for colour management applications.

12
as I described before, you will need to download the latest EOS utility version 3.0.1 release date 09/29/2014 from canon usa website. That version works under yosemite

13
Some of the X-Rite software does not work under yosemite e.g X-Rite colormunki photo. X-Rite promises upgrades by mid november.
Canon EOS utility, there is only one version that works = 3.0.1, so you will need to download that version

14
Wide colour gamut? IPS? Matte screen? Unless the answer to all three is "yes", then the answer to the title of this post is "no".

Game, set and match.

Jim

Mac OS X 10.10 Yosemite only supports 8bit/color channel (24 bit color). This is absolutely ridiculous as good monitors such as Eizo and Nec support 10 and 12 bit/color channel.

For those that push photoshop to the limit, such as working  on detail in shadows, this results in banding.

A pc with proper graphics card and let's say EIZO CG276 will deliver proper colors. I know that the EIZO is only 2560 pixels

15
Just downloaded latest version eu3.0.1x-installer.dmg and it works on yosemite on my Macbook Pro

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