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Pentax Objectif SMC-DA 12-24mm / f4,0 AL

5.0 étoiles sur 5 1 commentaire client

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  • Ouverture maximum : 4mm
  • Ouverture focale minimum : 12 mm
  • Ouverture focale maximum : 24 mm
  • Stabilisation d'image : non

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Informations sur le produit

Descriptif technique
MarquePentax
Ecran3 pouces LCD
Stabilisation d'imageNon
FonctionsObjectif zoom, 12,5mpx, Full HD 1080p
Type d'installation Pentax
Distance focale12 millimètres - 24 millimètres
Ouverture du diaphragme4
Type de viseurélectronique OLED XGA
Modèle21577
  
Informations complémentaires
Dimensions du produit (L x l x h)22,9 x 22,9 x 22,9 cm
Moyenne des commentaires client 5.0 étoiles sur 5 1 commentaire client
Numéro du modèle de l'article21577
ASINB000B8AF9W
Classement des meilleures ventes d'Amazon 175.901 en High-tech (Voir les 100 premiers)
Date de mise en ligne sur Amazon.fr21 novembre 2005
  
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Descriptions du produit

<b>Type d'objectifs</b> : Zoom<br><b>Compatibilité de la Bayonnette</b> : Pentax/Samsung<br><b>Stabilisateur d'Image</b> : Non<br><b>Autofocus</b> : Oui


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Commentaires en ligne

5.0 étoiles sur 5
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Meilleurs commentaires des clients

Ce 12-24mm Pentax est une pure merveille. Monté sur un K20D, il donne des photos époustouflantes juste avant le Fisheye. En paysage: des perspectives à couper le souffle: idéal en montagne. En bord de mer, il permet de capter l'horizon en arrière plan de sujets. Des effets de présence et de relief tout à fait hors du commun. Les photos produites par cet objectif embellissent presque la réalité. Il faut voir comment sont rendues des surfaces de plans d'eau, par exemple en mer avec les reflets et les ondulations, quasiment du vrai relief. Bien sur, il faut tout de meme éviter de placer les personnages qui vous sont chers en bord d'image, ils vont ressembler à des statues de l'Ile de Paques. Bref, l'objectif qu'il faut avoir si vous souhaitez capter l'attention des autres par vos photos!
Remarque sur ce commentaire 12 personnes ont trouvé cela utile. Avez-vous trouvé ce commentaire utile ? Oui Non Commentaire en cours d'envoi...
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Commentaires client les plus utiles sur Amazon.com (beta)

Amazon.com: HASH(0x90825e70) étoiles sur 5 23 commentaires
45 internautes sur 45 ont trouvé ce commentaire utile 
HASH(0x9040f660) étoiles sur 5 Vivid color, amazing linearity, sharp to corners - but delicate alignment 1 septembre 2007
Par Rudy - Publié sur Amazon.com
Pop Photo (Apr-06) praised this lens as a "Wide Winner" for spectacular performance on bench testing: excellent image sharpness and contrast; imperceptible distortion ["best of breed"]; and barely notable vignetting at the short end. I can add breathtaking color, crisp contrast and ruler-straight linearity to that list. At first glance, a 2X zoom doesn't sound impressive these days - until you realize that this parafocal zoom sweeps an incredible 100 to 60 degree viewing range, that's just perfect for cramped interiors, group pictures or landscapes. This zoom is a landmark of stellar engineering: combining extra-dispersion glass and aspheric lens elements into flagship "great glass".

But a finely-tuned optical engine performs optimally only if all cylinders fire in unison ... at daylight trial, I noted a hideous 'purple fringing' [chromatic aberration] of trees and power lines outlined against an overcast sky -- something was badly remiss. Rather than returning the lens, I packed it up for warranty service so as to alert the manufacturer to quality control slippage. Irreparable misalignment [probably from rough shipping/handling] was acknowledged; replacement with a brand-new lens was hassle-free as well as timely.

Should you detect distortion (run some test shots before starting a formal shoot!), fear not -- Pentax service was knowledgeable, courteous, and helpful. To their great credit, exchange was virtually painless, and the new replacement lens at last performs flawlessly. Although the initial unit turned out to be a glass lemon, Pentax made good (try that with a new car!); I have nothing but praise for the fair and decisive warranty follow-through.

Tip: the bulbous cyclops snout of the forward element is close to the surface, begging for scratches and smudges. Protecting the front end with a haze or UV filter in essence adds an unproven 14th glass element to a balanced optical design -- buy the high quality multi-coated filter (mounted in a thin WA ring) this star performer deserves to minimize glare, internal reflection and corner vignetting.
52 internautes sur 54 ont trouvé ce commentaire utile 
HASH(0x9040fa68) étoiles sur 5 A must for the wide end 9 janvier 2007
Par Lauren G - Publié sur Amazon.com
The main problem with the APS-C sensor is the fact that to get a very wide angle of view, you need a special lens. My old 20mm lens, which has served me for many, many, years, is just a moderate wide on the digital sensors.

With a few doubts, I sprang for this super-wide zoom.

WHAT A SURPRISE! This lens is AMAZING!

Low or no distortion (you can get away without correcting for distortion in Photoshop - quite a feat - unless you have a fanatical lunatic architectural client). CA hard to see. Very sharp, sharper wide open than any zoom has a right to be!!

Flare is so well controlled, I shot right into th sun and did NOT get the usual string of circles, just one ghost. How do they DO that???

The constant aperture is a blessing (I still refuse to buy a zoom with a variable aperture).

All modern lenses are polycarbonate. Supposedly, it's more dimensionally stable than metal under temperature extremes. Maybe so, but I still have some of the older K and M lenses and some Limited lenses. I guess I'm just old fashioned.

But with the APS-C sensor, you need a VERY wide lens. This is the one that will save your hide on any assignment where you need ultra-wide angle of view.

Penatx has always been known for their glass. With this lens, they continue to impress those who know that the glass is what counts!
14 internautes sur 16 ont trouvé ce commentaire utile 
HASH(0x909be714) étoiles sur 5 A nice ultrawide 21 juin 2008
Par K. Gittins - Publié sur Amazon.com
This lens covers a handy range of focal lengths. At 24mm (equivalent to 35mm on a 35mm film camera) it replicates the popular moderate wide angle that is handy for car shows, architecture, landscapes and group shots.

Go down to 12mm, and you get a very wide view, great depth of field, and essentially no barrel distortion.

Although there is some overlap in the focal length of the Pentax 10-17mm lens, that one has the pronounced "fisheye" distortion (though not too much at 17mm), while the 12-24 maintains straight lines (it's "rectilinear") though if you are tilted up (or down), your subject will lean in (or out).

More expensive than some lenses but less than others, I say it is worth it. Its constant f4 maximum aperture is part of the cost (and weight).

It is a little bulky, not lightweight, and has a rather large lens hood, so you might have to rearrange your bag divider...
7 internautes sur 8 ont trouvé ce commentaire utile 
HASH(0x9040fae0) étoiles sur 5 Best darn wide angle zoom out there 8 décembre 2008
Par Robert Gonzalez - Publié sur Amazon.com
Achat vérifié
This lens is amazing. If I had a choice of one lens to leave on my camera forever, this would be it. Its sharp, contrasty, and the angle of view at 12mm is AMAZING. The distortion is minimal to my eyes though I have not measured it. I'm just very happy with the results I consistently get with it.

Its very flare resistant and though the lens is mostly plastic, its feels very solid and well made. Not a whole lot of slop to any of its movements. Its very lightweight, so its not a burden to carry it around. I just wish it was a tad shorter, but this is not a complaint.

The range is very good for a walking around lens, the 24mm upper end gives about a 36mm angle of view equivalent for a 35mm standard film camera.

Just add a 50-135 2.8 and you have a great range for just about everything.
4 internautes sur 5 ont trouvé ce commentaire utile 
HASH(0x9040fccc) étoiles sur 5 revised: I love it, yet it irritates me 23 décembre 2009
Par OregonCoast - Publié sur Amazon.com
Revision: Pentax repaired my lens. Its infinity setting was slightly off (i.e., shorter than infinity), causing autofocus to "hunt". Repair cost $95 and took 13 days including shipping. Had I known this I would have asked for a repair during warranty. Lesson learned: if something is amiss, don't assume it's a feature common to all units; instead consider the possibility of a defective unit.

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Instead of duplicating other folks' reviews, I'll briefly add a few points that are minor or major depending on your view.

First, my Pentax 12-24 mm lens (attached to a Pentax K100D) takes nice pictures when it lets me. With this lens, the K100D hunts for autofocus, and often gives up. I've become so exasperated that I have 3 pieces of masking tape attached on the focusing ring of the lens so that I'm shooting manual focus fixed at infinity. It works for most sightseeing shots outdoors. When it doesn't, I need to loosen the masking tape, and suffer the skittish autofocus or focus manually. The autofocus problem can happen in broad daylight, with only a UV protective filter attached to the lens. My other lenses are not this bad.

Second, the big hood makes it devilishly difficult to rotate my polarizing filter. So much so that I don't use the hood. But I get good shots anyway.

Third, although I also have the Pentax 10-17 mm diagonal fisheye zoom (wonderful lens), the Pentax 12-24 mm gives me great panorama shots, too. I use PTGUI to stitch multiple photos, and PANO2VR to create QuickTime and Flash movies.

Fourth, the lens is a bit slow, and the filter diameter is a bit wide. Meaning you need good light, and if you want a polarizing filter, the price will be steep.
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