Compare the lens, the trade-offs and the used market.
Compare real, mount-specific lens families using catalog specifications and current MPB, KEH and qualifying eBay offers. See where prices differ—and where the data is not sufficient to recommend a purchase.
Research tool, not an optical laboratory test or condition-adjusted bargain ranking. We may earn commissions from qualifying retailer referrals at no additional cost to you.
Step 1 · Choose compatible comparisons
Select your camera system and two lenses
Changing the system and submitting refreshes its available lens list. The current release covers MPB-supported lens families only. A technical match does not replace a camera-specific compatibility check.
Ownership intelligence · Optional
Is another lens actually worth buying?
Identify a lens already in your bag and the type of photography you want to improve. The comparison will distinguish new focal coverage, potentially useful capability differences and purchases that may duplicate what you own.
Both listings are classified under Nikon Z. Matching mount alone does not establish identical electronic features or full-frame coverage.
These zoom ranges overlap. Paying for a second lens may duplicate existing framing unless aperture, handling or other verified abilities solve a specific problem.
The listed maximum f-numbers differ (4.5-5.6 versus 5.6-6.3); for variable-aperture zooms these figures may apply only at the wide end. Verify the aperture at the focal length you use.
The information does not establish autofocus speed, optical sharpness, copy condition, seller warranty or included accessories. Keep your current lens if the candidate does not solve a meaningful need.
Buying intelligence · Historical asking prices
Are current prices unusual for these lens families?
Evidence is based on daily lowest advertised prices, not completed sales or a specific condition-matched copy. Compare sellers independently. An attractive historical position is not proof of a good individual lens.
Nikon Nikkor Z 100-400mm f/4.5-5.6 VR S Autofocus FX Lens for Z-Mount
KEH Camera
Current eligible starting price: $2,347
41 observed dates (2026-10-04 to 2026-11-13). Daily minimum prices ranged from $2,316 to $2,355; median $2,347.
Current starting price is equal to the observed median daily minimum. This does not account for condition differences.
MPB US
Current eligible starting price: $1,759
5 recorded observation days. At least seven separate days are needed before a historical comparison is shown.
Nikon Nikkor Z 180-600mm f/5.6-6.3 VR Full-Frame Autofocus Lens for Z-Mount
KEH Camera
Current eligible starting price: $1,801
41 observed dates (2026-10-04 to 2026-11-13). Daily minimum prices ranged from $1,791 to $1,867; median $1,801.
Current starting price is equal to the observed median daily minimum. This does not account for condition differences.
MPB US
Current eligible starting price: $1,619
5 recorded observation days. At least seven separate days are needed before a historical comparison is shown.
KEH and MPB price histories are separate. MPB observations begin November 9, 2026; a KEH trend is not an MPB trend. Prices may vary by copy, grade, accessories and final checkout cost.
Step 3 · Current used-market evidence
Compare offers, not just headline prices
These are the lowest eligible advertised offers from each data source, not matched-condition copies. MPB’s feed only says “used”; confirm the exact grade, accessories, stock, returns and final delivered price at the retailer. A lower advertised price does not establish a better deal.
Nikon Nikkor Z 100-400mm f/4.5-5.6 VR S Autofocus FX Lens for Z-Mount
MPB's lowest listed copy is $588 below KEH's lowest listed copy. This is not a like-for-like condition comparison; inspect each exact item and total cost.
KEH Camera$2,347 · ExcellentFeed checked Nov 13, 2026
MPB's lowest listed copy is $182 below KEH's lowest listed copy. This is not a like-for-like condition comparison; inspect each exact item and total cost.
KEH Camera$1,801 · ExcellentFeed checked Nov 13, 2026
MPB US — compare the specific used lens, not just the starting price: MPB gives shoppers another source of pre-owned lens inventory and an opportunity to compare asking prices with KEH and eBay. Our current MPB data identifies the lens model, listed price and availability, but does not provide the individual copy’s detailed condition assessment or accessories. On MPB’s product page, review the condition description, any available photographs, what is included, and the applicable warranty, delivery and return information. Choose based on the complete offer and your intended use—not the lowest advertised price alone.
KEH: Consider the stated grade as seller-specific evidence, not a standardized rating that can be treated as equivalent to MPB or eBay. Confirm accessories, warranty, return period and the exact copy.
eBay: Inspect the seller's description, condition photos, feedback, returns, exact model and any known defects before treating a low listing price as a real alternative.
All retailers: Compare the total payable amount, including shipping and taxes, only after verifying equivalent equipment and what is actually included.
Decision rule: When condition evidence is incomplete, report an advertised price difference, not a quality-adjusted deal score or a definitive seller winner.
Offer timestamps and availability are checked server-side; they can change between display and checkout. No inferred condition grade, warranty, discount or seller ranking is presented as a fact.