Don't worry, there are no April Fool's jokes here! This week brings us an insanely-good deal on the DA 20-40mm Limited in black, along with a number of other lenses. As always, the most up-to-date deals can be found in our deal finder. Lowest prices of the year are highlighted.

Details below:

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K-mount Lenses

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HD DA 20-40mm F2.8-4 Ltd. WR
33% Off / $245 Below Average

• $497 @ B&H Photo
• $666 @ Amazon
• $797 @ Adorama
• $800 @ Pentax(USA)

Year's price range: $497 - $797
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DA 40mm F2.8 XS
12% Off / $21 Below Average

• $149 @ Amazon
• $230 @ B&H Photo

Year's price range: $149 - $200
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DA 50mm F1.8
12% Off / $13 Below Average

• $97 @ B&H Photo
• $100 @ Pentax(USA)
• $117 @ Adorama

Year's price range: $97 - $117
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DA 17-70mm F4
7% Off / $23 Below Average

• $327 @ Adorama
• $327 @ Amazon
• $497 @ B&H Photo

Year's price range: $267 - $438
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HD DA 35mm F2.8 Ltd. Macro
7% Off / $27 Below Average

• $347 @ B&H Photo
• $347 @ Amazon
• $389 @ Adorama
• $500 @ Pentax(USA)

Year's price range: $347 - $389
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DA 18-270mm F3.5-6.3
5% Off / $24 Below Average

• $447 @ B&H Photo
• $447 @ Adorama
• $447 @ Amazon

Year's price range: $437 - $527
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DA 50-200mm F4-5.6 WR
5% Off / $9 Below Average

• $170 @ Amazon
• $197 @ B&H Photo
• $197 @ Adorama
• $200 @ Pentax(USA)

Year's price range: $170 - $197
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Third-Party

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Sigma 18-250mm F3.5-6.3 DC Macro HSM
29% Off / $129 Below Average

• $319 @ Adorama
• $319 @ Amazon

Year's price range: $319 - $549
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Samyang 16mm F2 ED AS UMC CS
18% Off / $65 Below Average

• $299 @ Adorama

Year's price range: $299 - $379
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Sigma 17-70mm F2.8-4 DC Macro HSM C
18% Off / $77 Below Average

• $357 @ Amazon
• $449 @ B&H Photo
• $449 @ Adorama

Year's price range: $357 - $449
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Sigma 35mm F1.4 DG HSM A
12% Off / $101 Below Average

• $774 @ B&H Photo
• $774 @ Adorama

Year's price range: $749 - $899
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Samyang 50mm F1.4 AS IF UMC
11% Off / $44 Below Average

• $349 @ B&H Photo
• $399 @ Adorama
• $499 @ Amazon

Year's price range: $329 - $399
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Sigma 17-50mm F2.8 EX DC HSM
11% Off / $42 Below Average

• $322 @ Amazon
• $369 @ B&H Photo
• $369 @ Adorama

Year's price range: $322 - $369
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Sigma 30mm F1.4 DC HSM A
10% Off / $45 Below Average

• $412 @ Amazon
• $499 @ B&H Photo

Year's price range: $412 - $499
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Sigma 500mm F4.5 EX DG APO
8% Off / $567 Below Average

• $6792 @ Amazon

Year's price range: $6792 - $8200
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Lensbaby Velvet 85mm F1.8
7% Off / $33 Below Average

• $450 @ Amazon
• $500 @ B&H Photo
• $500 @ Adorama

Year's price range: $450 - $500
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Rokinon 135mm F2.0 ED UMC
6% Off / $28 Below Average

• $419 @ B&H Photo
• $419 @ Amazon
• $499 @ Adorama

Year's price range: $384 - $469
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Samyang 100mm F2.8 ED AS UMC Macro
6% Off / $23 Below Average

• $399 @ B&H Photo
• $399 @ Adorama
• $399 @ Amazon

Year's price range: $399 - $455
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Irix 15mm F2.4 Firefly
5% Off / $21 Below Average

• $400 @ Adorama
• $475 @ B&H Photo

Year's price range: $399 - $425
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Flashes

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AF 540 FGZ II Flash
10% Off / $50 Below Average

• $430 @ Adorama
• $499 @ B&H Photo
• $580 @ Pentax(USA)
• $607 @ Amazon

Year's price range: $399 - $499
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645 Lenses

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D FA 645 90mm F2.8 Macro
36% Off / $1148 Below Average

• $2000 @ Amazon
• $3997 @ B&H Photo
• $3997 @ Adorama
• $4000 @ Pentax(USA)

Year's price range: $2000 - $3925
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