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Pentax 400mm f/5.6 ED IF FA645 Mount Lens

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The Pentax 400mm f/5.6 ED IF FA645 Mount Lens

The Pentax SMC FA 645 400mm f/5.6 ED IF is a legacy telephoto prime lens that’s compatible with the Pentax 645D/645Z. Key features include:

Telephoto Prime. With a focal-length equivalent to 315mm after sensor crop-factor, the 400mm f/5.6 is a high quality prime that reaches out to the super-telephoto focal range. Its long reach makes it ideal for wildlife photography, and the adventurous might stretch it for sports photography use.

AF/MF Clutch. The 400mm f/5.6 uses a clutch design to switch between AF and MF, giving you fast access to make minute manual-focusing tweaks.

Internal Focusing. The internal focus design means the focusing group is much smaller and easier to move. Not only does this allow the lens barrel to stay in place while focusing, it also increases focusing speed.

Please Note. This is a legacy lens that was originally designed for medium-format film cameras. We’ve noticed a tendency for it to slightly front- or back-focus, so you’ll want to make sure you micro-focus adjust before you start shooting.

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We offer a 3-day inspection period on all sales, during which time you may return the item for a refund of the purchase price, not including shipping.

On this item, we include a LensAuthority 90-day limited warranty. This warranty covers damage that arises from normal use of the item. It does NOT cover accidental or intentional damage. More details are available in our FAQ section.

In addition to the standard 90-day warranty, you may have the option to purchase an extended warranty. If we're able to offer an extended warranty on this item, you'll see a checkbox to add that warranty - see the area just above the "Add to Cart" button.

If you select the extended warranty, you'll get additional protection from Consumer Priority Service ("CPS"). The CPS warranty will take effect after our 90-day warranty ends. However, the CPS warranty term would begin on the date of purchase. For example, if you buy an item with a 2-year extended warranty today, your coverage would end two years from today. Click the link below for all the details:

Extended Warranty Details