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HD Lens coating
SMC เรื่มใช้เมื่อ 1960
HD Coating เริ่มใช้เมื่อ 2012 แล้ว ดียังไง ลดlight loss, ลด reflex of light on elements surface,ซึ่งมีผลทำให้ flare ลดลง, ghostingลดลง,contrastเพิ่มขึ้น
Pentax have just announced a facelift of their entire DA-Limited lens lineup, as optically-improved and cosmetically-redesigned "HD" versions of the DA 15, 21, 35, 40, and 70mm Limited lenses will soon be replacing the current DA-Limited lenses. All of the new "HD" lenses will be available in both black and silver, and their glass has been treated with Pentax's new HD coating, a nano crystal lens coating that does a better job of reducing ghosting and flare than traditional multi-coatings. In the past, silver versions of DA limited lenses were only offered as special editions.
The aperture diaphragm in all the new lenses also getting an upgrade: their aperture blades will now employ a fully-rounded design.
PENTAX DA 15mm f4 ED ALLimitted
SMC Pentax-DA 15mm F4 ED AL Limited
Sharpness
9.0
Aberrations
9.1
Bokeh
8.0
Autofocus
9.4
Handling
9.7
Value
8.8
Description:
The SMC Pentax-DA 15mm F4 ED AL Limited is a prime extreme wide-angle lens only suitable for Pentax APS-C DSLRs. Technical details:
Pros: Built qualitiy, size, starburst, low distortion, pictures makes you to screw up the eyes from pleasure
Cons: Could be sharper, works only in crop mode on FF
Sharpness: 9 Aberrations: 10 Bokeh: 8 Autofocus: 10 Handling: 10 Value: 10 New or Used: Used Camera Used: K-5
As soon as i bought my first DSLR (K5 with a kit lens) back in 2012 i wanted to have a good wide/super wide angle lens for landscapes, as it is my main interest in photography.
At first i had a possibility to buy few quite rare soviet MF m42 lenses (MIR 20 M 3.5/20 and MC Zenitar 2,8/16) and i've used them about half of the year. The pictures they produced didn't met my expectations (soft, lots of unwanted artefacts, aberations) so i sold them without a hesitation.
Then i started to read reviews in this forum about SMC Pentax-DA 15mm F4 ED AL Limited. One by one. Checked the pictures here and on Flickr. At that time i was always checking local second hand lens market, and luckily for me there was one copy of my wish listed lens.
Currently, i'm using it more than 4 years and from my point of view all the good things that has been said about it here is truth. A true gem!
I'm using it also during weddings and other shoots. I had couple of accidents because of clumsiness, dropped it on the pavement from like one meter high.. Thanks for pentax limited lenses built quality it is working perfectly.
The lens is the best companion while traveling, add gorilla pod focus tripod and you have the most light weighted, super quality set for landscapes. I prefer long exposure (for this i use B+W ND 110 filter + Carl Zeiss T* circular polarizer + pentax remote control F) and you need only to set focus to infinity in MF mode, find a right composition -> stunning pictures.
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