Tamron meldet, daß sich die Markteinführung der beiden jüngst mit A-Bajonett angekündigten Objektive aufgrund der durch das Erdbeben in Japan entstandenen Lieferprobleme für Komponenten auf unbestimmte Zeit verzögert:
http://www.tamron.co.jp/en/news/release_2011/0330.html
ZITATMarch 30, 2011
Tamron Co., Ltd.
Postponement of Sales Launch for Sony Mounts
18-270mm F/3.5-6.3 Di II PZD (Model B008)
SP 70-300mm F/4-5.6 Di USD (Model A005)
March 30, 2011, Saitama, Japan - To all the persons who suffered damage from the Tohoku-Pacific Ocean Earthquake of March 11, 2011, Tamron Co., Ltd. (Morio Ono, President and CEO) would like to express its most sincere condolences and wishes for the earliest possible recovery.
The Company is grateful for the continued loyal patronage of its products. At the recent CP+2011 Camera and Photo Imaging Show, Tamron had announced the sales launch date for the two products listed below:
18-270mm F/3.5-6.3 Di II PZD (Model B008) for Sony mount
SP 70-300mm F/4-5.6 Di USD (Model A005) for Sony mount
Tamron had been preparing for the scheduled launch of these products in March, but due to the effects of the Tohoku-Pacific Ocean Earthquake, we have experienced difficulty in securing our parts supply system and had to consider such issues as the disruption of distribution logistics. As a result, the launch date has been delayed.
To customers awaiting these products, retailers and other related partners, Tamron offers its profound apologies for any inconvenience experienced. The Company will provide information on the sales launch date as soon as the decision has been made.
NOTE: The Sony mount does not include the VC image stabilization functionality, as the body of Sony digital SLR cameras includes image stabilization functionality. Thus, the Sony mount product names are designated as 18-270mm F/3.5-6.3 Di II PZD and SP 70-300mm F/4-5.6 Di USD.[/quote]
Bei "PZD" (Piezo Drive) handelt es sich übrigens um eine - bei Tamron - neue Form des Antriebs für die Entfernungsverstellung durch einen Piezo-Mikromotor im Objektiv:
http://www.tamron.eu/de/objektive/technolo...iezo-drive.html
Das entspricht also dem Mikromotor in Sonys SAM-Objektiven. Der präzisen Verstellbarkeit steht allerdings die begrenzte Lebensdauer solcher Motoren entgegen.
"PZD" muß von Tamrons "USD" (Ultrasonic Silent Drive) unterschieden werden, das eher dem SSM-Direktantrieb durch einen Ultraschallmotor (ebenfalls auf dem Piezoeffekt basierend) entspricht:
http://www.tamron.eu/de/objektive/usd.html
Kameraseitig erfolgt die Ansteuerung über das gleiche Protokoll, alle SSM-fähigen Gehäuse sollten also damit umgehen können (Implementierungsfehler ausgenommen).
Viele Grüße,
Matthias