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Sigma 18-250mm f3.5-6.3 DC MACRO HSM for Pentax Digital SLR Cameras

$296.79
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Product Description

Description:

By revolutionizing the optical and structural design of the Sigma 18-250mm F3.5-6.3 DC HSM, this lens achieves a compact size and a minimum focusing distance of 13.8. Thermally Stable Composite (TSC) maintains its structure and has little contractility especially in varying temperatures, is incorporated into the lens barrel. It is convenient when you wish to keep your equipment to a minimum and yet still be prepared for all opportunities and situations Excellent for macro photography Close-up capability is improved with the minimum focusing distance of 13.8 throughout the entire zoom range, and maximum magnification ratio of 1:2.9. In APS-C size equivalent, macro photography with approximately 1:2 magnification ratio is possible. In addition, with this lens, the size and flaming of subjects can be adjusted by rotating a zoom ring, making macro photography easier than using fixed focal macro lens. For further convenience, the maximum magnification ratio at each focusing distance appears on the side of the lens barrel. Revolutionizing the design foundation results in compact size Optimization of the power arrangement by such things as incorporating double-sided aspherical lenses, and reexamination of design, the filter diameter size is reduced. This compact size lens has the approximately 13x high zoom ratio with the filter size of diameter 62mm, and dimensions of diameter 2.9 x Length 3.5. It ensures portability and overall ease of use, making it perfect for travel and leisure photography. Thermally Stable Composite (TSC) The material TSC (Thermally Stable Composite), which has little contractility especially in temperature changes, as well as maintaining firmness, is incorporated into the lens barrel. Compared to Polycarbonate which is generally used, TSC has higher elasticity by approximately 25%. Since thermal shrinkage is low, it has high affinity to metal parts which contributes to high quality product manufacturing. It also contributes to the parts such as the zoom ring and scaling to be slimmer. Lens Construction In a conventional lens, focusing requires an extension of the entire lens or the front lens group. However, to better accommodate autofocusing mechanisms and closeup photography, a need has arisen for lenses that do not change their length during focusing or suffer from focus-dependent variation in aberration. Therefore, Sigma has developed focusing systems that only move elements within the lens barrel. These incorporate smaller and lighter moving lens elements which help improve auto-focus speed. With their unchanging barrel length and small variation in the center of gravity, these lenses also enhance balance and stability for the photographer. Furthermore, since the front of the lens does not rotate, polarizing filters can be used with extra convenience. 

Features:
  • equipped with Super Multi-Layer Coating to reduce flare and ghosting
  • High performance and compact with great zoom ratio
  • Hyper Sonic Motor (HSM) to ensure fast and quiet auto-focusing
  • Lens hood front & rear cap included
  • Made with Thermally Stable Composite material

Specifications

BrandSigma
ManufacturerSigma
MPN883-109
Base SKUSIG18250OSMAFP
UPC085126883614



Frequently Asked Questions

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Shipping Options:

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Usually delivers in 3 - 10 business days after shipment

How do product returns work?
Return Policy:
If you are not satisfied with your order and wish to initiate a return, please contact us via buyorders@6ave.com. All returns must be accompanied with an RA number assigned by a Sixth Avenue Electronics Express representative. Products must be in Brand New condition, including the manufacturer's box with all included accessories. We will not accept any returns without the recorded serial numbers and upc numbers intact on the box. Returned items will be subject to a restocking fee of 5%-20% of the total price. Shipping price is not refundable. The buyer is responsible for shipping charges to return an item back to us. If an item arrives Damaged, please contact us immediately. We will file a claim with the shipper, and ship a replacement as soon as the claim is approved (between 1-6 business days). We hope items never arrived damaged, but unfortunately it does infrequently occur. We thank you in advance for working with us. Certain products are not eligible to be returned at all. Those include hygienic and personal care products (e.g shavers), a/v equipment, and special order products.

Tax Policy:
New Jersey residents are subject to sales tax.