The Pentax 28-45mm f4.5 ED AW SR HD DA lens with 645 mount is an ultra-wide-angle lens with SR Shake Reduction for use with the 645D and 645Z medium-format DSLR cameras. This weather-resistant lens provides a 35mm equivalent focal length of 22-35.5mm, making it great for capturing a wide variety of scenes and subjects, in particular images with an exaggerated perspective. Its optics consists of 17 elements in 12 groups, including two high-performance aspherical elements and two extra-low dispersion elements. In addition, the Pentax-innovated SR mechanism has been incorporated into this versatile lens, which effectively compensates for camera shake up to approximately 3.5 shutter stops.
The Key Features
- Ultra-wide angle zoom lens with 1.6X zoom ratio
- 2 Extra low-dispersion ED lens elements
- 2 AL Aspherical elements
- HD Coating and Aero Bright Coating
- Lens-installed SR mechanism
- For use with 645D and 645Z medium-format DSLR cameras
This is an ultra wide-angle zoom lens designed specifically for degital use, featuring the best of Pentax lens technology.
Providing focal lengths from 22mm to 35.5mm in the 35mm format, this is exclusively designed for digital imaging. Its image circle is optimised for an image sensor of the new Pentax 645Z medium-format digital SLR camera, and a number of Pentax developed technologies including advanced lens coatings are incorporated, to deliver super-high-resolution images made possible only by medium-format digital SLR cameras.
First ultra-wide-angle zoom lens for use with medium-format digital SLR cameras
This zoom lens offers a zoom ratio of approximately 1.6 times to cover ultra-wide-angle to wide-angle ranges (for focal lengths of 22mm to 35.5mm in the 35mm, when mounted on a Pentax 645Z or 645D camera body). With visual effects unique to wide-angle lenses, including exaggerated perspective and expanded depth-of-field, this lens can be used for a wide variety of scenes and subjects, such as sweeping landscapes and cramped rooms, adding more versatility to advanced medium-format digital SLR photography.
State-of-the-art optical design to optimize super-high-resolution images
Designed as the HD Pentax DA-series model in the Pentax 645 lens series, this lens's image circle is optimized for the image sensor of the Pentax 645Z camera body. Its optics consists of 17 elements in 12 groups, including two high-performance aspherical elements and two ED (Extra-low Dispersion) elements, to enhance image resolution and brightness at edges, while minimizing various aberrations. Coupled with innovative lens coatings and an anti-reflective coating applied to the interior of the lens barrel, this lens is designed to bring out the best performance of medium-format digital SLR cameras.
HD Coating and Aero Bright Coating to optimize light transmittance and minimise reflection
Back to top
This lens is treated with the high-grade, multi-layer HD Coating to optimize light transmittance and minimise reflection. This coating delivers sharp, clear images free of flare and ghost images, even under demanding lighting conditions such as backlight. By coupling this coating with the Pentax exclusive, high-grade Aero Bright Coating, this lens is designed to assure exceptionally high light transmittance and super-low refraction.
Back to top
|Filter Thread Size (mm)
|Focal Length – Tele (mm)
|Focal Length – Wide (mm)
||Front lens cap, 645 lens mount cap, lens softbag S120-210
|Maximum Aperture – Tele
|Maximum Aperture – Wide
|Number of Lens Elements
|Number of Lens Groups
||151.5 x 99 mm
Buy Now Pay Later
With our no deposit Buy Now Pay Later option, pay nothing for six months when you spend £250 or more, then either settle the cash price in full by paying a £29.00 settlement fee, or choose to spread the cost over 36 months at 19.9% APR Representative. Please see the repayment example below to see how much purchasing this item on finance would cost.
|Item Value (Cash Price)
|Total Amount Credit
||35 x £156.55
|Total Amount Payable
|Annual Rate of Interest
Are you eligible for finance?
Applicants must be:
- Aged 18 years or older from the application date
- In permanent UK residence for a minimum of three years
- Fulfil at least one of the following employment criteria:
- In regular, permanent employment.
- Retired from regular employment - With a minimum age of 50.
- Not working through disability.
Note: All applicants will be subject to a credit reference check by the lender.
Credit is subject to application and status. Warehouse Express Ltd trading as Wex Photographic act as credit broker and not the lender. Barclays Partner Finance act as the lender.
Can I repay early? If so how?
No repayments are scheduled in the initial six-month deferral period. However, it is possible to pay off the loan, either by way of a lump sum or in smaller amounts. If the loan is fully repaid within the six-month deferral period, then no interest is payable, but a £29.00 early-settlement will be incurred. Such repayments may be made to Barclays Partner Finance by cheque, debit card or standing order. Unfortunately it is not possible to set up a direct debit within the deferral period. Further information on how to make such repayments will be set out in the loan agreement pack provided by Barclays Partner Finance.
What happens if I don't repay within the first six months (deferral period)?
Following the six month deferral period, Barclays Partner Finance will initiate a monthly direct debit payment for the remaining duration of the loan. Interest will be charged at a rate of 19.9% APR on outstanding balances (backdated to the first date of the loan). Late payment penalties and early repayment charges will apply from this point. Barclays Partner Finance will send a reminder letter approximately one month before the six month deferral period is due to elapse. Note: If you chose to spread the cost and pay monthly, interest is charged from the start of the loan, not from the start of the repayment period.
What will I receive from the finance provider (lender)?
Barclays Partner Finance will send a loan agreement pack approximately four weeks after delivery of the goods, confirming that the account has been activated and, from this point, it is possible to make repayments against the loan.
For further information on how our finance product work, see our Finance help section.
Back to top
† Once your application has been accepted, usually within minutes, we will immediately dispatch your equipment.