ELWD inverted finite 50x-60x objective

zzffnn · Post by **zzffnn** » Wed Oct 21, 2015 1:23 pm

Thank you for checking in.

I am wondering if there is any inverted microscope 50x-60x objective (corrected for 1-1.2 mm cover) that:

1) is reasonably priced (preferrably under $200 used, minor dent/scratch/delamination is OK);

2) has extra long working distance at 2mm or more;

3) has preferably 160 mm tube length (though any finite tube length is fine) and NA of over 0.65.

I do not want metallurgical objective corrected for no cover slip.
I already have a Nikon DLL 30x NA 0.55 LWD inverted objective corrected for 0.9-1.5 mm cover (from Nikon model S inverted scopes).

If you can refer me to a brand/model name, catalog or part number, it would be highly appreciated.

Thank you very much and have a great day!

zzffnn · Post by **zzffnn** » Fri Oct 23, 2015 4:10 pm

Any comment or educated guess would be highly appreciated, thank you.

ChrisR · Post by **ChrisR** » Fri Oct 23, 2015 4:56 pm

Well from the Nikon CFI brochure - you'll guess what the numbers are.
Under 200 bucks though - a challenge I'd have thought.

ELWD 20xC 0.45 8.2-6.9 0-2.0
ELWD 40xC 0.60 3.6-2.8 0-2.0
ELWD 60xC 0.70 2.6-1.8 0.1-1.3
ELWD ADM 20xC 0.45 8.2-6.9 0-2.0 PH1
ELWD ADM 40xC 0.60 3.6-2.8 0-2.0 PH2
ELWD ADL 60xC 0.70 2.6-1.8 0.1-1.3 PH2
ELWD NAMC 20xC 0.45 7.40 0-2.0
ELWD NAMC 40xC 0.60 3.10 0-2.0

Ichthyophthirius · Post by **Ichthyophthirius** » Fri Oct 23, 2015 5:57 pm

Hi,

With such a high spec (60x, NA 0.7, LWD), the objective does require a correction collar and that usually makes them expensive. Among the 160 mm objectives, 40:1 and NA 0.6 is usually the more afordable option.

I thought there were no 60x, NA 0.7 for 160 mm, but there actually is such a Plan objective from Nikon http://spectraservicesinc.com/product/lwd60xnikon.html

Leica has an HCX PL Fluotar L63x/0.70 0.1-1.3 mm, WD 2.6-1.8 mm, infinity. The same WD range as for the Nikon Chris found
ELWD 60xC 0.70 2.6-1.8 0.1-1.3
so > 2 mm might get REALLY expensive.

Regards,

Ichty

zzffnn · Post by **zzffnn** » Fri Oct 23, 2015 9:02 pm

Thank you guys!

I only know LWD 60x infinity versions (like those CFIs mentioned by Chris). But I don't have a Nikon Eclipse or suitable infinity scope.

The LWD 60x finite that Ichty mentioned seems to cost over $1000 used. But I am glad that it exists! I would keep an eye on it, in case a miracle occurs :-p

At $1000, a smarter buy might be picking up a Nikon Eclipse infinity inverted scope from a local (univeristy) surplus sale - you may have a CFI LWD 60x there, if you are lucky.

I actually picked up my Nikon 30x NA 0.55 DLL LWD 0.9-1.5 for less than $50 shipped! It has a scratched correction cap, but lenses are all perfect!

ChrisR · Post by **ChrisR** » Sat Oct 24, 2015 4:03 am

Sorry zz I misread

I've emailed you a copy (came from CK I think) of the Nikon CF brochure. The only in-range objective there is the Ph3 which Ichty found.

zzffnn · Post by **zzffnn** » Sat Oct 24, 2015 6:48 pm

Thank you very much Chris.

I said it wrong actually - I could use those Nikon CFIs, if I change my Labophot 2's head to a infinity head from the Eclipse series. At least that is what I heard.

In reality though, the LWD CFI 60x would cost over $600 and the infinity head would cost over $100. Still too expensive.....