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Messages - simonbratt99

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1
Macro / My macro rig
« on: April 12, 2013, 03:32:49 PM »
Just testing if i can post a pic here, if so heres the Canon 100L and canon bracket.Sorry struggling to insert an image, ah i think thats it?

Its rock solid stable compared to the usless £8 used bracket i got off ebay, and im pleased with the illumination. Its only 1:1 but its a start.

http://lastlightimages.smugmug.com/Other/Conceptual/20099206_V4S8HM#!i=2453739608&k=PdN6m4f&lb=1&s=A

2
Macro / Re: Mp-e and 100mmL sharpness
« on: April 10, 2013, 06:28:25 AM »
Cheers.

3
Macro / Mp-e and 100mmL sharpness
« on: April 10, 2013, 06:06:19 AM »
Hi

With the MP-e at 1:1, is there any difference in the sharpness compared to the canon 100mm L  (assuming close macro work)?

4
Macro / Re: Reverse a lens for macro.
« on: April 09, 2013, 02:49:10 AM »
Yes i have seen that video before, great video.
Isnt a MP-E effectively a reversed lens or is it its own engineering.

5
Macro / Re: Reverse a lens for macro.
« on: April 08, 2013, 05:57:32 PM »
wow, thanks for all your great replies.
I was thinking of the best canon 50mm lens to reverse, but by the sound of it i would be better off saving up for the MP-E. I was just after a cost saving really.

I did just get today the proper canon flashgun bracket (i know stupidly expensive for what it is), and i can say, what a lovey bit of kit tied with my canon 2.8L 100mm  for 1:1 macro, even with no diffuser im getting some nice results (albeit only 1:1)

I would be interested in the Kenko tubes but for £100+ to go from 1:1 to 1:68 i cant see the value.


6
Macro / Reverse a lens for macro.
« on: April 08, 2013, 11:02:33 AM »
Whats the deal with reversing a lens for macro?
Any good?
For example a nifty fifty with a reversing ring, what macro size will that get and is the image quality good?
Im trying to avoind buying that MP-E lens!!

7
Speedlites, Printers, Accessories / Re: Eneloops and charger
« on: March 26, 2013, 12:36:27 PM »
Alkaline's typically have 1.5v of voltage and rechargeable's have 1.2v. Voltage on its own does not tell you how much charge (Juice or mAh) remain in a cell - the only way to accurately determine this today is to discharge the cell, like the MAHA C-9000 does in the Refresh/Analyze or Breakin cycles.

Alkalines tend to hold voltage near 1.5v and then suddenly drop off whereas rechargeables will drop-off gradually.


BTW, you should always keep your cells together in sets of two or four, depending on your use and make sure whatever charger you use, it is capable of doing single cell charges.

hmm i could have sworn it was the otherway round, rechargeables keep the power then suddenly drop and alkies start dropping power as they are used, straight away.

Also my eneloops are showing 1.4v and 1.47v instantaneous battery voltage

I would keep cells together, but i have devices that need 1, 2, 3 and 4 batteries.

8
Speedlites, Printers, Accessories / Re: Eneloops and charger
« on: March 26, 2013, 12:10:03 PM »
Im surprised the chargers cant tell how much energy is stored in the cells, as i also have a £2 analogue battery tester that tells me how much power a battery has in it.

no it does not. :)

Ok er, its telling me the voltage in the battery? which in turn is (on the same scale) telling me if the battery is good or needs replacing. For £2 this better be highly accurate!

9
Speedlites, Printers, Accessories / Re: Eneloops and charger
« on: March 26, 2013, 11:36:40 AM »
I've got the La Crosse BC-700, which looks like it's the same one as yours. I believe that's just displaying the current charging rate, not the current capacity of the battery. I don't know that it ever displays the actual current capacity of the battery, although I might be wrong.

Didn't the charger come with a manual? You know, those few pages of paper that we all throw away immediately because we already know how to use all of our devices since we're all so smart?

It shows the charging current, sure, i leave it on the default of 200mA as i was told slow is better.
The capacity is shown in mAh BUT, i think im being told thats only the power its stuffed into the cell during this charge cycle.
Yes ive read the paper manual. Its actually a little book!! but it only states the mAh is the capacity. So crazily i assumed this ment the capacity of the cell.

Just checked the manual again. It stated Capacity display while charging (mAh) is Accumulated Capacity. Slightly ambigious

10
Speedlites, Printers, Accessories / Re: Eneloops and charger
« on: March 26, 2013, 11:33:21 AM »
Thanks for the reply.
Ah ok so the mAh reported for the AA is the enery its stuffed into the cell while charging, not the actual power of the cell. That makes sence.
I will probably run this breakin cycle later.

So if the cell charging stopped at reported full at 700mAh for a 1900mAh cell, then the cell probably had 1900-700=1200mAh in it when it started charging? is that the right way to look at it?

Im surprised the chargers cant tell how much energy is stored in the cells, as i also have a £2 analogue battery tester that tells me how much power a battery has in it.


11
Speedlites, Printers, Accessories / Re: Eneloops and charger
« on: March 26, 2013, 09:50:41 AM »
Additionally.

Does anyone know how to tell how much charge is in a battery?
The new charger BL700 give me readings for each battery etc etc. but i cant see that a battery that says FULL is reading anywhere near 1900mAh
I would assume if i put back in some newly charged batteries, the mAh should read near its capacity, but they read more like around 700mAh

12
Speedlites, Printers, Accessories / Eneloops and charger
« on: March 25, 2013, 11:24:21 AM »
Hi

Just got 10 eneloops (3rd gen, AA 1900mAh) with a BL700 charger, couple of questions.

1. Does it matter if i part charge them before turning off the charger, (ie travelling before fully charged)?
2. Should the batteries be removed from a flashgun if not being used for x amount of days or weeks?

Surprised my eneloops only had 20mAh in them from new.

13
Macro / Re: canon 100L+tubes+2x converter ?
« on: March 22, 2013, 06:39:25 PM »
OK well the 100mm L canon lens is... 100mm
So that makes it, with all three kenko tubes (36mm, 20mm, 12mm), 1.68:1
Wow i wont be bothering.

To basically the longer the lens ie the 180mm L canon will get even less benefit from the same tubes.
Well thats that plan out the window then

14
Speedlites, Printers, Accessories / Re: First flash unit advice?
« on: March 22, 2013, 09:48:37 AM »
thanks, yet another gadget im going to have to learn to use!!
Anyone know some standard settings?

15
very good points, thanks

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