Cunha wrote: ↑

Sun Feb 11, 2024 2:54 pm

This one:
https://www.mjkzz.de/products/manual-ma ... 9132826724

That is one, I was thinking Aliexpress, lots of choices there:

https://www.aliexpress.com/store/110139 ... =517541694

Hi Robert, your opinion as a professional is indeed very welcome. So, what do you suggest, for example, for a manual focusing rail for lenses like the MP-E 65mm, instead of the Novoflex proposals? I ask you the same for a bellows for the GFX. Thank you very much .-) Sorry for the slow reply, some f...

Maybe I can help. I have a set of 5.6/100 componon lens cells I can give as a gift for your project but you will need a #0 shutter or iris mount. Might be a problem getting the cells from California to you. I can put them on eBay for $1 to make things really easy. RobertOToole, thank you very much ...

If you want to test your objective with a short tube lens, a good one is the Componon-S 5.6/100. I've used some lower-end Omegarons and Comparons 4.5/105 with very good result as well, they are quite cheaper than the Componon. No need to overpay for a tube lens, and even less if you're not sure you...

That sure sounds like chatgpt to me. By chatbot you mean me? Not at all, I mean "Ushavilash". Their one other post is nonsensical, this one is probably a chatgpt output (note it's almost relevant but also completely off base of the topic). In a few weeks those posts will likely be automatically edi...

Are these any good? The impression I'd gotten was that nobody seemed to have good experiences with these computar lenses. I've never had any good experiences with any of the Computar dL series. People collect the dLs so I thought I would mention the lens. The design is interesting anyway. The Compu...

You had already expressed these weaknesses in the Novoflex bellows, but what equipment has no weaknesses? .-) Perhaps the weaknesses can be overcome with practicality, versatility, availability and in using many cameras and many lenses (lots of adapters available)? At Novoflex, according to my deca...

Wouldn’t recommend that - mine was in a terrible state (fungus and some kind of oil or grease). Plus the missing mount and aperture… not worth it! Oh wow, thanks for sharing that. One thing that says a lot? Those 105-150 lenses have been for sale for something like 5 years at least sold as a "close...

Just got a tip, the surplus shed 105-150 lenses are still for sale for only $49 but they are no complete and missing a lens mount:

https://www.surplusshed.com/pages/item/L10514.html

Just FYI.

Best,

Robert

_N-20240122_133312.jpg Couple of lenses up for sale. Buyer pays shipping at my cost (no markup). Paypal, Venmo, zelle, or Wise okay Message me with any questions please or feel free to make an offer. Great for small format MFT owners or for coupling. Copal E90C 115mm M39 mount printing machine lens...

... the diameter of the GFX mount is 65mm and the mounting screws (for the precious few adapters I've seen that actually have mounting screws on the GF side) are positioned at a diameter of 75mm. That's too big even for the modified Vivitar. The bellows clearance is 50x50, which is plenty big for t...

You dont see these everyday for sale so just in case someone is looking for one: Computar dL Vari Focal 105-150MM F/4.5-5.6 _vari-focal-105-150-lens-test.jpg https://www.ebay.com/itm/285527412342? These are neat lenses, I did test one in a stacked setup, but my (Kowa) copy suffered from CAs and low ...

Very nice thanks for sharing.

I looked up the tech details, below, to save others a click:


Sony ILCE-7RM3
FE 90mm F2.8 Macro G OSS
ƒ/11.0
90.0 mm
1/250
ISO:100

I have to assume flash.

Best,

Robert

The lens in question looks suspiciously similar to the 150mm Comparon I tested in 2019 as a tube lens coupled with a 2.8/35 Componon. https://www.closeuphotography.com/150mm-tube-lens-test __Screen-Shot-2024-01-30-at-7.39.06-PM.jpg __Screen-Shot-2024-01-30-at-7.38.45-PM.jpg Sorry for the bad news: _...

That OFM70350HN-TS is a serious specialist. Double telecentric and 7X implies that it does 7X and nothing else. If you change the object-to-lens distance then you have to change lens-to-image distance as usual to maintain perfect focus, but you still get 7X in the new configuration. I assume that i...