Production
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Country
Korea (at least one Pentax-mount example)
Optical
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Updated
Jul 16, 2026
Quantaray Quantaray 70-210mm f4
Minolta MD · 70mm · f/4
Compiled from 1 real reviews · AI-assisted · accuracy-checked · Updated 16 Jul 2026
Overview
The Quantaray 70-210mm f/4-5.6 is a budget third-party telephoto zoom sold under the Quantaray house brand, which was retailed primarily through Ritz Camera and other US photo stores as a rebadged product manufactured by various OEMs. According to the reviews, at least one Pentax-mount example was made in Korea. Community discussion notes that some Quantaray zooms are near-identical to Sigma lenses of the era, with one owner observing that his copy 'appears to be almost the same as a Sigma that I own.' The reviews document an unusual mechanical trait: it is described as a 'TWO-ring manual focus zoom lens,' which a forum member found weird because 'most two-ring zooms tend to be autofocus (and the Push-pull ones are MF).' Despite being a manual-focus lens (one reviewer confirmed 'It's not autofocus'), it developed a small following among frugal shooters simply for its very low cost and decent daylight results. No established nicknames or jargon exist for this lens in the reviews.
Verdict: The Quantaray 70-210mm f/4-5.6 is a bargain-priced, manual-focus telephoto zoom best suited to hobbyists and frugal shooters who want reach in good daylight without spending more than a few dollars. It produces sharp, nice-looking photos in bright conditions but stumbles in low light and at full zoom. Anyone needing autofocus or reliable indoor performance should look elsewhere, but as a cheap, fun daytime tele it earns modest praise.
Optical Character
Sharpness wide open
Sharp in good daylight but a bit of a challenge to get sharp images at full 210mm zoom.
Community Insights
What people love
- Very low cost, with the average listed price around $24.99 and one owner buying a similar copy for just $20
- Sharp photos and pleasing look in good daylight conditions
- Recommended by 100% of reviewers (albeit a very small sample) as a usable day lens
What people dislike
- Poor low-light performance; not good for indoor shots even with some light unless a tripod is used
- Manual focus only, which surprised buyers expecting autofocus with cameras like the K100D
- Difficulty achieving sharp images at full 210mm zoom
- The Pentax DA-L 50-200mm reportedly does a bit better in low light and at full zoom
Pro Tips
- Use it as a daylight lens for best results, as reviewers explicitly say it 'works best as day lens'
- Use a tripod when shooting in lower light to compensate for its weakness there
- Take extra care focusing manually at full 210mm zoom, where achieving sharpness is more difficult
- Consider a Pentax 50-200mm or Sigma 70-300 APO if you have any budget, as reviewers suggest these have slightly better image quality
Compatible Adapters
Real adapters from our shop that fit this lens mount.
Standard · ฿540 · In stock
Standard · ฿540 · In stock
Standard · ฿540 · In stock
Standard · ฿1,250 · In stock
Standard · ฿890 · Out of stock
Minolta MD Lenses to Canon EOS R Mount Camera Adapter
Standard · Out of stock
Minolta MD Lenses to Nikon Z Mount Camera Adapter
Standard · Out of stock
Sources (1)
Web research
The Quantaray 70-210mm f/4-5.6 is a bargain-priced, manual-focus telephoto zoom best suited to hobbyists and frugal shooters who want reach in good daylight without spending more than a few dollars. It produces sharp, nice-looking photos in bright conditions but stumbles in low light and at full zoom. Anyone needing autofocus or reliable indoor performance should look elsewhere, but as a cheap, fun daytime tele it earns modest praise.
https://www.pentaxforums.com/userreviews/quantaray-70-210mm.htmlhttps://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/8531-what-can-you-tell-me-about-lens-quantaray-70-210mm-f-4-0-5-6-a.html