I think both SFP looks fine to cover 50 meter distance.
AJ716B or 670504-001 -> 850nm laser that provides 8Gb connectivity up to 150m (492ft) on OM3 multimode fiber - Has one LC 8-Gb port
C8R23A or 717875-001 -> 850nm laser that provides 8Gb connectivity up to 300m (984ft) on OM4 fiber - Has one LC 8-Gb port
Hope this helps!
Regards
Subhajit
I am an HPE employee
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