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By admin, on June 21st, 2014
After Canon Patent News: 500mm f/4 DO, 500mm f/5.6 DO, 600mm f/4 DO, 800mm f/5.6 DO Lenses patent and Canon Patents 70-300mm, 100-400 mm F4.5-5.6 DO Lens Patent now we have Canon EF 400 f/4 DO IS patent information, it has been really a long time since we have seen any real DO lens announcement.
Canon Patent Details Translated by Google
- Patent Publication No. 2014-109700
- Publication date 2014.6.12
- Filing date 2012.12.3
- Example 1
- Focal length f = 392.00-381.59-332.99mm
- Fno.
- Half angle ω = 3.16-3.10-2.81 °
- Image height Y = 21.64mm
- The overall length of the lens 292.02mm
- BF 105.64mm
By admin, on June 19th, 2014
A latest patent surfaced over the web that shows latest patent of EF 100-400 f/4.5-5.6 STM Lens, there is also a patent document of already announced EF-S 55-250 f/4-5.6 IS STM lens, so finally we have a strong hope that Canon Patent EF 100-400 f/4.5-5.6 STM Lens can be announced on Q4 of 2014 or along with Canon 7D Mark II.
Take a look at the patent details below
- Patent Publication No. 2014-102462
- Publication date 2014.6.5
- Filing date 2012.11.22
- Example 1
- Zoom ratio 4.24
- Focal length f = 56.90-133.00-241.28mm
- Fno. 4.12-5.04-5.83
- Half angle ω = 13.50-5.86-3.24 °
- Image height 13.66mm
- 154.33-176.38-191.20mm overall length of the lens
- BF 41.21mm
- Example 5
- Zoom ratio 3.73
- Focal length f = 104.59-199.99-389.99mm
- Fno. 4.58-5.03-5.87
- Half angle ω = 11.69-6.17-3.18 °
- Image height 21.64mm
- 245.09-285.06-308.91mm overall length of the lens
- BF 68.73mm
via-egami
By admin, on June 17th, 2014
Canon multi-view camera patent is pending, as far as I can understand from the patent the camera will give you Depth-of-Field control like Lytro camera, wide range of perspective control, excellent noise control, resolution conversion, HDR, distance estimation like a Rangefinder.
Description and self-interpretation of the patent literature The patents below are translated via Google Translator.
- Patent Publication No. 2014-110442
- Publication date 2014.6.12
- Filing date 2012.11.30
- Canon patents
- Multi-lens camera concentrically arranged an imaging device and a plurality of lenses
- I do light field, angle of view changes, perspective changes, noise reduction, resolution conversion, HDR, distance estimation, the disparity estimation
- Patent Publication No. 2014-110443
- Publication date 2014.6.12
- Filing date 2012.11.30
- Canon patents
- I provided a handle to the multi-lens camera
- Parameter change in the rotation of the handle
- Patent Publication No. 2014-110444
- Publication date 2014.6.12
- Filing date 2012.11.30
- Canon patents
- I reduce the number of the imaging lens element than the number of multi-lens camera
- By the rotation of the optical unit, to select a specific lens
By admin, on June 17th, 2014
 Canon EF-M 55-200mm f/4.5-6.3 IS STM Lens finally announced, the 55-200mm is first zoom lens announced by Canon for its mirrorless system. The lens features built-in optical image stabilization to fight with camera shake, STM motor do quite AF and best for recording videos without the AF noise, the most important factor is the compactness of the 55-200mm lens and it weighs 206gm only.
If we look at the MTF chart (small & Slim dotted lines show sharpness and contrast at MAX aperture, the thick ones are recorded at F8), the MTF look very good at wide and tele-end.
Continue reading Canon EF-M 55-200mm F4.5-6.3 IS STM Lens Announced
By admin, on June 16th, 2014
According to latest rumors Canon may announce EF-M (mirrorless) 55-200mm F4.5-6.3 IS STM lens soon, 55-200mm lens will be a nice add-on for mirrorless users, at current we have only three lenses for Canon mirrorless system, first is EF-M 18-55mm f3.5-5.6 IS STM (comes as a kit lens with EOS-M cameras), second is EF-M 22mm f/2 STM Lens and third one is EF-M 11-22mm F4-5.6 IS.
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source – Digicame-info
By admin, on June 2nd, 2014
Before we start we must know that the battle is between Sigma vs Canon prime lenses (where is tamron?), being a budget photographer I always keep eye on price tag + specification / performance of a product….. starting from the current price
- Sigma ART Lens – 50mm f/1.4 DG HSM Lens price is approx $949.00 at B&H and Amazon and
- Canon EF 50mm f/1.2L USM Lens will cost you $1,619.00 (no need to give buying links.. i know you will not buy this lens after reading the comparison below)
Now its time for image comparison (all image credit belongs to famous Wedding photographer will chao, website here with more image comparison)
My first reaction was WOW, both lens output look soooo amazing.. the bokeh is very creamy.. but the real test start from the image below..
Continue reading Ultimate Fight – Sigma 50 Art Lens vs. Canon 50mm F1.2L
By admin, on May 24th, 2014
Canon Patent two new DO Lenses – 70-300mm, 100-400 mm F4.5-5.6 DO Lens, image and details below
Description and self-interpretation of the patent literature
- Patent Publication No. 2014-89385
- Publication date 2014.5.15
- Filing date 2012.10.31
- Example 1
- Zoom ratio 3.78
- Focal length f = 103.00-200.00-388.94mm
- Fno. 4.63-5.24-5.83
- Half angle ω = 11.86-6.17-3.18 °
- Image height Y = 21.64mm
- 228.82-273.58-303.10mm total length
- BF 69.48-90.93-105.73mm
- Example 6
- Zoom ratio 4.00
- Focal length f = 72.50-135.00-289.99mm
- Fno. 4.44-5.04-5.85
- Half angle ω = 16.62-9.10-4.27 °
- Image height Y = 21.64mm
- 143.91-177.69-203.15mm total length
- BF 39.10-39.10-39.10mm
Canon diffractive optical (DO) Lenses are smaller and lighter compared to the lenses of same focal length, for example EF 70–300mm f/4.5–5.6 DO IS USM lens is 28 percent shorter than the EF 70–300mm f/4–5.6 IS USM lens. But the price DO lenses are generally high compared to the normal lenses of same focal length.
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