September 22, 2014, 02:40:20 PM

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Messages - Jamesy

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31
EOS-M / Re: Next official EF-M Lens
« on: July 18, 2014, 11:16:05 AM »
Admittedly I have not looked into Speedboosters but I wonder how they increase stops of lights passing through them? Changing perspective such as what an extender does I get but extenders degrade the amount of light rather than boost it.
A teleconverter enlarges the image projected by the lens. This is much like moving a projecter further away from a projector screen - much of the image is missing from the screen, and even though the quantity of light coming out of the projector is no different, what is on the screen is bigger and dimmer.

Do it the other way only works if you're using a lens designed for a larger format. It telecompresses the light into a smaller imaging circle, producing a brighter, smaller image. Same concept as a projector throwing out too big an image for a screen, so you move it closer.

Obviously using a larger projector screen (read: sensor) in the first place would have captured the same quantity of light, even through the intensity per unit area on the screen (sensor) is lower.

Or a different way of looking at it is the focal length has changed due to a teleconverter or telecompressor, but the physical aperture still has the same diameter. Therefore the aperture ratio (f stop) has to change.

A telecompressor is just a way of using a smaller sensor to do most of what a larger sensor would do with that lens natively. Even though numbers all get shifted around (focal length, aperture ratio, ISO, but not physical aperture or shutter speed), the end result should be the same (presuming the telecompresor ratio is that same as the crop factor, and you tweak all the settings to create equivalence).
Much clearer now - thanks for this!

32
EOS-M / Re: Next official EF-M Lens
« on: July 18, 2014, 08:58:26 AM »
Admittedly I have not looked into Speedboosters but I wonder how they increase stops of lights passing through them? Changing perspective such as what an extender does I get but extenders degrade the amount of light rather than boost it.

33
Pricewatch Deals / Re: SanDisk Sale at B&H Photo
« on: July 16, 2014, 05:12:42 PM »
I have had good luck and fast speeds with the Transcend USB 3.0 RDF8 for $14.95.

http://www.bhphotovideo.com/c/product/815153-REG/Transcend_TS_RDF8K_USB_3_0_Multi_Card.html

34
Pricewatch Deals / Re: SanDisk Sale at B&H Photo
« on: July 16, 2014, 02:54:42 PM »
Not bad.  A few months back I picked up a San disk 32 160mb/s for 119 and I though I got a good deal... then the price kept falling and I kept price matching... my final price was $92ish... that was a good day.

Stark contrast to my 32GB (90MB) Extreme Pro I picked up shortly after getting my 5D3 two plus years ago - I paid $159 if memory serves me correctly. FWIW, the card is still a rock solid performer.

35
EOS-M / Re: How Much Would You Pay...
« on: July 15, 2014, 01:08:10 PM »
I would pay $799 for a revised body with EVF and way better performance such as shot-to-shot and AF speed and shutter lag. This would be in line with the Fuji XE-2, although the Fuji glass is still way better IMO.

36
EOS-M / Re: Next official EF-M Lens
« on: July 15, 2014, 01:00:11 PM »
With the latest telephoto, I would guess that Canon is done with M lenses.

Do you think they are going to kill off the M line?

37
EOS-M / Re: Arca Swiss plate for EOS M
« on: July 15, 2014, 07:09:12 AM »
I read in another thread elsewhere that the Kirk PZ130 works well too and it does not interfere with opening the battery door either.

http://www.adorama.com/KIRPZ130.html?utm_term=Other&utm_medium=Affiliate&utm_campaign=Other&utm_source=cj_4137899

38
OP: Good review, thanks for taking the time to write it. My M c/w 22 and 18-55 is my new 'goto' travel kit leaving the 5d3 and 24-105 at home. In the past I have always tended to have 15 pounds of 'just in case' gear on my shoulder or back on vacation but I have done a couple of recent trips with only the M and have been satisfied with the outcome. The lack of EVF/OVF is an issue in bright sun and I am learning techniques to work around them...

the other what a fun power management with the M is.
Do you mean the poor battery life of the M?

39
Software & Accessories / Re: Adobe Customer Advisor
« on: July 14, 2014, 04:16:42 PM »
Just the usual July Connection emails, nothing out of the ordinary.

40
Software & Accessories / Re: To filter or not to filter
« on: July 14, 2014, 04:14:22 PM »
I don't use UV (protection) filters on my 40/2.8 pancake or on my EF-M lenses, but I do on the all the others that take them.

This is my exact scenario too.

41
Canon General / Re: Colombia
« on: July 13, 2014, 08:44:37 PM »
Mikey from lightenupandshoot.com used to live in Columbia - check out his site, he is a very friendly guy and will give you tips on travelling there. Contact him through his site, I am sure he will respond. He taught me years ago in Toronto on one of his travelling road shows - solid guy.

42
Photography Technique / Re: Help me on using tripod
« on: July 10, 2014, 02:01:25 PM »
Good advice thus far. Also, if you setup on a slope, keep one leg as far down the slope as possible. I would not walk around with your camera mounted to the tripod from spot to spot even it may be tempting to do it because stuff happens and your camera likely would not survive the 'Rapid Acceleration-Deceleration Test' ;)




43
EOS-M / Re: Next official EF-M Lens
« on: July 03, 2014, 10:03:19 AM »
Digging around, there appears to be patent applications for the following Canon branded lenses...

16-120mm f3.5-5.6 - please ! Now !!!
18-200mm f3.5-6.3 - how very Tamron
22-46mm f3.5-5.6 - Presumably pancake, could be tempted ;-)
I agree  - the 16-120 could be a winner and the Tammy has #2 covered but I don't understand he last
one. It is an overlap of the 18-55 kit lens unless there is something I'm missing. Pancake you say ? Pancake zoom?
Yes, maybe something like http://www.dpreview.com/products/olympus/lenses/olympus_m_14-42_3p5-5p6_ez
Cool - thanks for that - I am not all that up on m43 gear - that looks like it would be an ultra compact addition to the M lineup.

44
EOS-M / Re: Next official EF-M Lens
« on: July 02, 2014, 10:27:46 PM »
Digging around, there appears to be patent applications for the following Canon branded lenses...

16-120mm f3.5-5.6 - please ! Now !!!
18-200mm f3.5-6.3 - how very Tamron
22-46mm f3.5-5.6 - Presumably pancake, could be tempted ;-)
I agree  - the 16-120 could be a winner and the Tammy has #2 covered but I don't understand he last
one. It is an overlap of the 18-55 kit lens unless there is something I'm missing. Pancake you say ? Pancake zoom?

45
EOS-M / Re: M+22mm for Travel/Street?
« on: July 01, 2014, 06:29:26 PM »
@Cory - I think you will like the M/22mm for street - it is a very discreet combo. I got a Flipbac G4 rubber grip for mine and it makes it much better to hold with one hand.

@fotofoll - Nice shots - very diverse subject matter. Are all of those shots done with the 22mm?

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