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Wide Angle Adapter in front of Variable diopter, i.e Rectilux?


SigurdW
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Hi all!

Wondered if anyone have had any success with Wide Angle attachments in front of variable diopters? Would «zoom through» adapters be more suitable than standard ones? Something that does what the 30mm attachment for the Kowa Cine Prominar 40mm does!

Need a get out of jail free cards in the situations where our DIY jewellery just wont cut it.

 

best, 

Sigurd

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Tried a Canon 0.8x WA in front of FVD-16A. It gives about 15-20% more coverage but very difficult to use. You need a proper support for it since you can't simply clamp on your FVD-16A's front. You will also need to be aware that most FVD extend when focus closer so it will hit your rear WA glass.

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3 hours ago, au8ust said:

Tried a Canon 0.8x WA in front of FVD-16A. It gives about 15-20% more coverage but very difficult to use. You need a proper support for it since you can't simply clamp on your FVD-16A's front. You will also need to be aware that most FVD extend when focus closer so it will hit your rear WA glass.

That is promising! Do you have to fiddle with the focus on the taking lens and scope in order to reach infinity or just focus with FVD?

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  • 11 months later...

I have been very happy with my banged up old PRO WA-8XLC Century Optics wide angle converter. It gives me infinity focus and close focus without diopter up to 35 inches from the sensor plane (22" from the front element). In order to clamp it to the front of my single focus solution I added an Xume MFXLA82 Lens Adapter (https://www.amazon.com/dp/B01LYDBB7K/ref=cm_sw_em_r_mt_dp_SXB7B01K3SKD18VGD6H3?_encoding=UTF8&psc=1). On a 50mm taking lens I experience no vignetting and the 0.8x factor turns the 50 into a 40mm.

IMG_3253.jpg

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On 2/4/2021 at 11:02 AM, SigurdW said:

Hi all!

Wondered if anyone have had any success with Wide Angle attachments in front of variable diopters? Would «zoom through» adapters be more suitable than standard ones? Something that does what the 30mm attachment for the Kowa Cine Prominar 40mm does!

Need a get out of jail free cards in the situations where our DIY jewellery just wont cut it.

 

best, 

Sigurd

Hey Sigurd, there is currently one on eBay for 50 bucks!

https://www.ebay.com/itm/284548022508

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There is also the option of having the Century WA adapter become the variable diopter using one of Pooli's helicoids.

This eliminates the need to double up on glass.

The weak link is the Century itself. The quality of the image towards the edges gets not-so-good.

On the plus side, it seems to help with flattening out the Kowa's uneven side crunch and gives shockingly close focus.

 

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