Quantaray Quantaray 28-80mm f3.5 Heritage

เรื่องราวของเลนส์

The Quantaray 28-80mm f/3.5 series belongs to a family of budget zoom lenses sold under the Quantaray house brand, which was a store label used by Ritz Camera stores. According to community knowledge in these reviews, Quantaray lenses were manufactured by Sigma (and reportedly others) at a lower quality tier than name-brand optics. The Pentax-mount 28-90mm f/3.5-5.6 'version 5' is described by reviewers as 'loosely based on the Sigma 28-80mm f3.5-5.6 series II lens, but altered to add 10mm on the long end.' A closely related 28-80mm f/3.5-4.5 MACRO variant and a 28-80mm f/3.5-5.6 MC Aspherical version also exist across Canon EF/EF-S, Sony/Minolta A, Nikon F, and Pentax K mounts, with first production listed as 1989 for the aspherical model. These were inexpensive consumer kit-grade zooms bought for a few dollars used. No established nicknames or cult jargon are evidenced in the reviews. There is no cult following as such; people buy these primarily because they are extremely cheap (average around $27) and fill a mid-range focal gap, not for any prized rendering.

สรุป: The Quantaray 28-80mm f/3.5 (and its 28-90mm and MACRO/aspherical siblings) is a rebadged Sigma-made budget consumer zoom sold through Ritz Camera. It is a cheap, plastic-bodied lens with modest sharpness, low contrast, dull colors, heavy flare, and misleading 'macro' capability. It is best suited to hobbyists who want an ultra-cheap mid-range zoom for casual use and don't mind fixing contrast and color in post. Anyone seeking sharpness, contrast, or a distinctive rendering character should look elsewhere.

คาแรกเตอร์ของภาพ

โบเก้

โดยรวมจัดอยู่ในระดับปานกลาง—ไม่มีลักษณะ bokeh แบบวน (swirl), ไม่มีลักษณะเป็นฟอง (bokeh bubbles) และไม่มีความครีมมี่ (creaminess) ที่โดดเด่น

โทนสี

สีหมองและความอิ่มตัวต่ำ จึงต้องเพิ่มความอิ่มตัวของสีในการแต่งภาพหลังการถ่าย (post-processing)

ความคม (เปิดสุด)

เวอร์ชันของ Pentax ให้ความคมบริเวณกลางภาพค่อนข้างดี แต่ยังนุ่มกว่าเลนส์คิทซูมที่เทียบได้ ส่วนรุ่น MACRO ยังค่อนข้างนุ่มแม้จะหรี่รูรับแสงลงแล้ว

แฟลร์

มีแนวโน้มเกิดแฟลร์อย่างรุนแรง ส่งผลให้ภาพที่ถ่ายโดยหันหน้าเข้าหาดวงอาทิตย์แทบใช้งานไม่ได้

คอนทราสต์

ผู้รีวิวหลายคนสังเกตว่าคอนทราสต์ต่ำ จึงมักต้องปรับคอนทราสต์เพิ่มในการแต่งภาพหลังถ่ายประมาณ +30

รีวิวจากผู้ใช้

ข้อดี

Extremely cheap to buy — often just a few dollars, average around $27, making it a low-risk purchase.
Good value for the money; 100% of Pentax reviewers recommended it as a budget option.
Fills the mid-range focal length gap between wide kit zooms and telephoto zooms.
Handling rated well (8.3 average on Pentax version) despite the modest optics.
Acceptable, usable results for casual shooting when the light is controlled and post-processing is applied.

ข้อเสีย

Plastic lens mount on the Pentax version, which reviewers worried about breaking.
All-plastic body construction on the aspherical variant.
Softness, especially on the 28-80mm MACRO which is soft even stopped down.
Low contrast and dull colors needing heavy post-processing correction.
Heavy flare in bright light, rendering sun-facing shots nearly useless.
Noticeable chromatic aberration that needed cleanup even at f/8.
The 'MACRO' badge is misleading — closest magnification is only 1:4, so it is not a true macro.
Jittery focusing when used manually on adapted mirrorless bodies, with a low hit rate.

เทคนิคการใช้

Shoot with the sun behind you or shaded — this lens flares badly and loses usability near strong light.
Shoot RAW and plan to boost contrast (~+30), saturation, and sharpness in post to counter its dull, soft, low-contrast output.
Stop down for better sharpness; one reviewer noted it may improve toward f/11 though this was unconfirmed.
Use a tripod when working at the macro/close-up setting, as focusing is finicky and the setup benefits from stability.
Correct chromatic aberration in post, as it appears even at f/8.
On mirrorless adapters, expect fiddly manual focus and a low hit rate — take your time and confirm focus with magnification.

แหล่งอ้างอิง (1)

Web-grounded synthesissecondary

The Quantaray 28-80mm f/3.5 series belongs to a family of budget zoom lenses sold under the Quantaray house brand, which was a store label used by Ritz Camera stores. According to community knowledge in these reviews, Quantaray lenses were manufactured by Sigma (and reportedly others) at a lower quality tier than name-brand optics. The Pentax-mount 28-90mm f/3.5-5.6 'version 5' is described by reviewers as 'loosely based on the Sigma 28-80mm f3.5-5.6 series II lens, but altered to add 10mm on the long end.' A closely related 28-80mm f/3.5-4.5 MACRO variant and a 28-80mm f/3.5-5.6 MC Aspherical version also exist across Canon EF/EF-S, Sony/Minolta A, Nikon F, and Pentax K mounts, with first production listed as 1989 for the aspherical model. These were inexpensive consumer kit-grade zooms bought for a few dollars used. No established nicknames or cult jargon are evidenced in the reviews. There is no cult following as such; people buy these primarily because they are extremely cheap (average around $27) and fill a mid-range focal gap, not for any prized rendering.

https://www.pentaxforums.com/userreviews/quantaray-28-90mm-f3-5-5-6-version-5.htmlhttps://www.talkemount.com/threads/quantaray-28-80mm-3-5-4-5-macro.8837/https://allphotolenses.com/lenses/item/c_3033.html