Vivitar Vivitar 50mm f1.9 Heritage

เรื่องราวของเลนส์

The Vivitar 50mm f/1.9 is a budget standard prime from the era when Vivitar was a rebrander commissioning lenses from various Japanese manufacturers. Reviewers consistently attribute this lens to Cosina, with one Pentax Forums reviewer stating outright 'I understand that this lens is manufactured by Cosina,' and a robertallenkautzphoto tester confirming via serial number (starting with 97) that his M42 copy 'is a Cosinon.' A companion Flickr note on the closely related f/1.7 version reinforces that these were 'made by Cosina for Vivitar,' assembled 'similar to Tomioka manufactured lenses,' with rumors that the companies shared components. The lens is a close sibling of the more commonly discussed Vivitar 50mm f/1.7 (which has its own review page), and reviewers frequently compare the two. It carries no established nickname beyond being a generic 'nifty fifty' style standard lens. Its cult appeal is rooted almost entirely in value: copies changed hands for as little as $3 (from an estate sale) up to about $20, and reviewers were repeatedly 'surprised' at how sharp such a cheap, obscure lens turned out to be. One reviewer noted that if the maker had simply limited the minimum aperture to f/2, 'it would be a cult classic' — implying it is not quite one, but has the character to flirt with it.

สรุป: The Vivitar 50mm f/1.9 is a cheap, Cosina-built standard prime that punches far above its price. It is soft and low-contrast at its maximum f/1.9 aperture but becomes genuinely sharp and contrasty from f/2, with a mellow, soft-to-swirly bokeh that gives its images real character. It's ideal for budget-minded adapters and vintage-lens tinkerers who want a fun, characterful fifty for pennies — and who don't mind manual focus, soft corners, and shooting a hair past wide open. Not a true cult classic, but a delightful bargain that flirts with the title.

คาแรกเตอร์ของภาพ

โบเก้

ลักษณะโบเก้เริ่มนุ่มแล้วค่อยๆ วนเป็นวง ให้ความละมุน ถูกบรรยายว่าน่าพอใจ และโดยรวมจะนุ่มกว่าเลนส์รุ่น f/1.7 เล็กน้อย

โทนสี

สีค่อนข้างหม่นเล็กน้อย แต่แก้ไขได้ง่ายในการแต่งภาพหลังการถ่าย

ความคม (เปิดสุด)

ให้ความนุ่มที่ f/1.9 แต่เริ่มชัดและมีคอนทราสต์ตั้งแต่ f/2 โดยบริเวณศูนย์กลางคมมาก ขณะที่ขอบและมุมภาพค่อนข้างนุ่ม

คอนทราสต์

ให้ภาพโดยรวมดีและมีคอนทราสต์ตั้งแต่ f/2 เป็นต้นไป แต่เมื่อเปิดรูรับแสงกว้างสุด ภาพจะนุ่มและคอนทราสต์ลดลง

รีวิวจากผู้ใช้

ข้อดี

Outstanding value — copies found for $3 to $20, repeatedly described as a bargain (value ratings up to 10/10).
Surprising center sharpness, rivaling or beating respected Pentax-M 50mm f/2 and f/1.7 lenses once stopped down.
Sharp and contrasty from f/2 onward with good shadow detail.
Pleasant, mellow bokeh (softer than the f/1.7 sibling) that some photographers specifically prefer.
Images with 'character' from the combination of soft/swirly bokeh and mixed sharpness.

ข้อเสีย

Soft and low-contrast wide open at f/1.9 — the widest stop is arguably the weakest.
Soft corners and edges at wide apertures.
Manual focus only, with no automatic/A aperture setting on the PK version (not a bayonet 'A' lens).
Minimum aperture of only f/16, listed as a con by more than one reviewer.
Slightly muted colors requiring correction.

เทคนิคการใช้

Shoot at f/2 rather than wide open at f/1.9 — reviewers agree it jumps from soft to sharp and contrasty with just that tiny stop-down.
Use f/1.9 deliberately when you want a soft, dreamy look; treat it as a creative option, not the default.
Correct the slightly muted colors in post — they respond well to processing.
Lean into the soft-then-swirly bokeh for portraits and backlit/silhouette shots, where the mellow rendering shines.
Since Cosina construction disassembles easily, a DIY degrease and re-lube can restore smooth focus and aperture action on old copies.

แหล่งอ้างอิง (1)

Web-grounded synthesissecondary

The Vivitar 50mm f/1.9 is a budget standard prime from the era when Vivitar was a rebrander commissioning lenses from various Japanese manufacturers. Reviewers consistently attribute this lens to Cosina, with one Pentax Forums reviewer stating outright 'I understand that this lens is manufactured by Cosina,' and a robertallenkautzphoto tester confirming via serial number (starting with 97) that his M42 copy 'is a Cosinon.' A companion Flickr note on the closely related f/1.7 version reinforces that these were 'made by Cosina for Vivitar,' assembled 'similar to Tomioka manufactured lenses,' with rumors that the companies shared components. The lens is a close sibling of the more commonly discussed Vivitar 50mm f/1.7 (which has its own review page), and reviewers frequently compare the two. It carries no established nickname beyond being a generic 'nifty fifty' style standard lens. Its cult appeal is rooted almost entirely in value: copies changed hands for as little as $3 (from an estate sale) up to about $20, and reviewers were repeatedly 'surprised' at how sharp such a cheap, obscure lens turned out to be. One reviewer noted that if the maker had simply limited the minimum aperture to f/2, 'it would be a cult classic' — implying it is not quite one, but has the character to flirt with it.

https://www.pentaxforums.com/userreviews/vivitar-50mm-f1-9.htmlhttps://www.flickr.com/photos/lensbubbles/29486453490https://www.robertallenkautzphoto.com/vivitar/vivitar-50mm-f1.9-autohttps://www.flickr.com/photos/wng555/albums/72157673674947951/