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Messages - heptagon

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EOS Bodies / Re: 7D now marked as DISCONTINUED at Amazon
« on: July 27, 2014, 08:01:23 AM »
Actually this means that Amazon is phasing out Cannons for Nikes due to the better dynamic rage and pixels revealed with the 810D.

And I thought heptagon meant Amazon was starting to sell cold war relics in place of American Civil War relics. ;)

Those Nikes you posted have quite some range. And they're big and white, too. Nice!

EOS Bodies / Re: 7D now marked as DISCONTINUED at Amazon
« on: July 27, 2014, 02:29:46 AM »
Actually this means that Amazon is phasing out Cannons for Nikes due to the better dynamic rage and pixels revealed with the 810D.

Lenses / Re: Tamron SP 150-600 f/5-6.3 VC Review
« on: January 04, 2014, 05:42:17 PM »
As the saying goes. Don't believe everything you see/hear on the internet.

So you are saying someone would just go on the internet and lie to the world?

Third Party Manufacturers / Re: New iPhone: Final Nail in the Coffin
« on: October 13, 2013, 09:09:33 AM »
Distance photography

Low-light photography

I'd like to add
Shallow DoF photography
What matters here is sensor size divided by f-stop number. You can only make good lenses up to about f/1 and it seems cheap lenses are stuck at around f/2. If you want to go shallower, you have to increase the sensor size.

Or to put it the other way around: A full frame DSLR with a f/5.6 lens could be replaced by a camera phone with an f/1 lens of shorter focal length and a chip of 8mm diagonal and produce THE EXACT SAME PICTURES (or even better because it has higher quantum efficiency and less read noise).

It seems to have some potent noise reduction algorithm.

Please take a picture of something with structure... maybe a wooden table lit by candlelight.

Lenses / Re: Recommend a 1.4x and 2x for my non-L lenses?
« on: September 01, 2013, 05:49:52 PM »
For which lens?

EOS Bodies / Re: 70D and Dxomark....
« on: August 30, 2013, 05:00:50 PM »
This forum feels like being caught in a loop, the same arguments repeated over and over again...

Reviews / Re: Which camera should I buy for a first timer
« on: August 11, 2013, 05:50:24 AM »
T2i and T3i have the same sensor. T4i adds in mediocre live view phase detection focusing.

T3i has video zoom (1:1 pixel video instead of line skipping) which some people like to use.
T3i has better phase detection AF compared to the T2i (can't remember exactly what but i think center point is same but outer focus points are better).

I don't think you'll need any feature the T4i provides. The 70D could prove worthwile but it's not out yet.

Magic lantern could be useful for learning because it offers you deeper control of the camera.

I'd get the T4i with the two kit lenses. They are not very good but you have every focal length 18-250mm covered and can add a decent prime to that (31mm would be 50mm full frame equivalent).

Lenses / Re: TS-E 90mm f/2.8 Replacement Info [CR1]
« on: August 10, 2013, 06:33:44 PM »
I've been playing around a bit with the TS-E 90 + 13+21+31mm Extension + 2x Extender and I got modestly sharp results at 5° tilt (more would have been unsharp) and could take a photo from a 10 degree angle. That was just enough to keep the lens (without hood) out of the reflection of a flat surface.

The reason for the low angle at the high tilt is in the short focusing distance (relative to the focal length of the lens, so a longer lens will not help here). When the Scheimpflug angle is 90° for infinity focus it's almost flat for a macro photo.

It would be great to take a 1:1 macro photo of a flat surface from a 45° angle but that would require much more tilt and the current lenses become very unsharp at large tilts when used with extension tubes.

So maybe a special lens design with a fixed large tilt would be possible but that would only be useful in a few macro scenarios. Still i'm curious what the macro tilt design is they may present.

Reviews / Re: Which camera should I buy for a first timer
« on: August 10, 2013, 12:44:45 PM »
go cheap.. it will show you what is important to you and then revisit in a year or two....

This! If it has manual focusing and manual exposure you can start to learn with any camera.

Lenses / Re: TS-E 90mm f/2.8 Replacement Info [CR1]
« on: August 09, 2013, 09:19:13 PM »
In order to become useful for macro photography we need much more than 8.5° tilt.

Lenses / Re: Canon EF 100-400 f/4-5.6L IS Update [CR2]
« on: August 06, 2013, 12:51:49 PM »
Holding back the 100-400 for the 200-400 1.4x doesn't really make sense to me because the latter is so much more expensive.... except if the new 100-400 costs 5000$ upwards. But then again it wouldn't really replace the old model. So something about this sounds fishy if you ask me.

EOS Bodies / Re: Canon 70d RAW Samples
« on: August 05, 2013, 03:28:19 AM »
But how does it look like when comparing ISO 100?

Lenses / Re: Lens flare.... I want it! :)
« on: August 03, 2013, 05:17:57 AM »
Buttercoat your filter from side which goes on the lens. Just stick your finger in some butter and then smear some grease on the filter (just a thin film). You can try to go in circles or from the inside out or even make some wavy structure. If you shoot with a tele you can clear the center again with some cloth dipped in alcohol. Enjoy.

Lenses / Re: Question about TDP's sample crops
« on: August 03, 2013, 05:07:37 AM »
I suspect that TDP only focuses at the center and doesn't refocus for corners or edges so just a trace mis-alignment, like a paper thin one, and....

As far as I know they do separately focus for every spot, repeat the test more than once and take the best result for each.

Besides thin DoF there is field curvature on a few lenses which makes it impossible to get a flat screen in focus.

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